From c3c708d6526323e956699d756cce03df1310fcd2 Mon Sep 17 00:00:00 2001 From: Paul Selkirk Date: Tue, 3 Feb 2015 10:49:36 -0500 Subject: reformat C code slightly --- sw/test-adder/Makefile | 8 +- sw/test-adder/novena-eim.c | 857 ++++++++++++++++++++++++--------------------- sw/test-adder/novena-eim.h | 618 ++++++++++++++++---------------- sw/test-adder/test-adder.c | 339 ++++++++++-------- 4 files changed, 964 insertions(+), 858 deletions(-) (limited to 'sw') diff --git a/sw/test-adder/Makefile b/sw/test-adder/Makefile index 5271b70..bd6cfa0 100755 --- a/sw/test-adder/Makefile +++ b/sw/test-adder/Makefile @@ -2,10 +2,10 @@ all: test-adder test-adder : test-adder.o novena-eim.o gcc -o test-adder test-adder.o novena-eim.o - + test-adder.o: test-adder.c novena-eim.h novena-eim.c - gcc -c test-adder.c - gcc -c novena-eim.c - + gcc -c -Wall test-adder.c + gcc -c -Wall novena-eim.c + clean: rm -f *.o test-adder diff --git a/sw/test-adder/novena-eim.c b/sw/test-adder/novena-eim.c index 9ea76ef..3fe3566 100644 --- a/sw/test-adder/novena-eim.c +++ b/sw/test-adder/novena-eim.c @@ -1,406 +1,451 @@ -//------------------------------------------------------------------------------ -// novena-eim.c -//------------------------------------------------------------------------------ - - -//------------------------------------------------------------------------------ -// Headers -//------------------------------------------------------------------------------ -#include -#include -#include -#include -#include -#include -#include "novena-eim.h" - - -//------------------------------------------------------------------------------ -// Variables -//------------------------------------------------------------------------------ -static long mem_page_size = 0; -static int mem_dev_fd = -1; -static void * mem_map_ptr = MAP_FAILED; -static off_t mem_base_addr = 0; - - -//------------------------------------------------------------------------------ -int eim_setup() -//------------------------------------------------------------------------------ -{ - // register cleanup function - int ok = atexit(_eim_cleanup); - if (ok != 0) - { printf("ERROR: atexit() failed.\n"); - return -1; - } - - // determine memory page size to use in mmap() - mem_page_size = sysconf(_SC_PAGESIZE); - if (mem_page_size < 1) - { printf("ERROR: sysconf(_SC_PAGESIZE) == %l\n", mem_page_size); - return -1; - } - - // try to open memory device - mem_dev_fd = open(MEMORY_DEVICE, O_RDWR | O_SYNC); - if (mem_dev_fd == -1) - { printf("ERROR: open(%s) failed.\n", MEMORY_DEVICE); - return -1; - } - - /* Several blocks in the CPU have common pins, we can use I/O MUX Controller - * to configure what block will actually use I/O pins. We wait EIM module to be able - * to communicate with the on-board FPGA. Let's configure IOMUXC accordingly. - */ - _eim_setup_iomuxc(); - - /* We need to enable clocking of EIM block in order to be able to use it. - * Let's configure Clock Controller Module accordingly. - */ - _eim_setup_ccm(); - - /* We need to properly configure EIM mode and all the corresponding parameters. - * That's a lot of code, let's do it now. - */ - _eim_setup_eim(); - - - // done - return 1; -} - - -//------------------------------------------------------------------------------ -void _eim_cleanup() -//------------------------------------------------------------------------------ -{ - // unmap memory if needed - if (mem_map_ptr != MAP_FAILED) - { int ok = munmap(mem_map_ptr, mem_page_size); - if (ok != 0) printf("WARNING: munmap() failed.\n"); - } - - // close memory device if needed - if (mem_dev_fd != -1) - { int ok = close(mem_dev_fd); - if (ok != 0) printf("WARNING: close() failed.\n"); - } -} - - -//------------------------------------------------------------------------------ -void _eim_setup_iomuxc() -//------------------------------------------------------------------------------ -{ - // create structures - struct IOMUXC_SW_MUX_CTL_PAD_EIM reg_mux; // mux control register - struct IOMUXC_SW_PAD_CTL_PAD_EIM reg_pad; // pad control register - - // setup mux control register - reg_mux.mux_mode = IOMUXC_MUX_MODE_ALT0; // ALT0 mode must be used for EIM - reg_mux.sion = 0; // forced input not needed - reg_mux.reserved_3 = 0; // must be 0 - reg_mux.reserved_31_5 = 0; // must be 0 - - // setup pad control register - reg_pad.sre = IOMUXC_PAD_CTL_SRE_FAST; // fast slew rate - reg_pad.dse = IOMUXC_PAD_CTL_DSE_33_OHM; // highest drive strength - reg_pad.speed = IOMUXC_PAD_CTL_SPEED_MEDIUM_10; // medium speed - reg_pad.ode = IOMUXC_PAD_CTL_ODE_DISABLED; // open drain not needed - reg_pad.pke = IOMUXC_PAD_CTL_PKE_DISABLED; // neither pull nor keeper are needed - reg_pad.pue = IOMUXC_PAD_CTL_PUE_PULL; // doesn't matter actually, because PKE is disabled - reg_pad.pus = IOMUXC_PAD_CTL_PUS_100K_OHM_PU; // doesn't matter actually, because PKE is disabled - reg_pad.hys = IOMUXC_PAD_CTL_HYS_DISABLED; // use CMOS, not Schmitt trigger input - reg_pad.reserved_2_1 = 0; // must be 0 - reg_pad.reserved_10_8 = 0; // must be 0 - reg_pad.reserved_31_17 = 0; // must be 0 - - // all the pins must be configured to use the same ALT0 mode - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_CS0_B, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_OE_B, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_RW, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_LBA_B, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD00, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD01, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD02, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD03, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD04, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD05, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD06, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD07, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD08, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD09, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD10, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD11, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD12, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD13, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD14, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD15, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_WAIT_B, (unsigned int *)®_mux); - eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK, (unsigned int *)®_mux); - - // we need to configure all the I/O pads too - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_CS0_B, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_OE_B, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_RW, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_LBA_B, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD00, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD01, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD02, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD03, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD04, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD05, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD06, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD07, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD08, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD09, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD10, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD11, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD12, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD13, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD14, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD15, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_WAIT_B, (unsigned int *)®_pad); - eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK, (unsigned int *)®_pad); -} - - -//------------------------------------------------------------------------------ -void _eim_setup_ccm() -//------------------------------------------------------------------------------ -{ - // create structure - struct CCM_CCGR6 ccm_ccgr6; - - // read register - eim_read_32(CCM_CCGR6, (unsigned int *)&ccm_ccgr6); - - // modify register - ccm_ccgr6.cg0_usboh3 = CCM_CGR_ON_EXCEPT_STOP; - ccm_ccgr6.cg1_usdhc1 = CCM_CGR_OFF; - ccm_ccgr6.cg2_usdhc2 = CCM_CGR_ON_EXCEPT_STOP; - ccm_ccgr6.cg3_usdhc3 = CCM_CGR_ON_EXCEPT_STOP; - - ccm_ccgr6.cg3_usdhc4 = CCM_CGR_OFF; - ccm_ccgr6.cg5_eim_slow = CCM_CGR_ON_EXCEPT_STOP; - ccm_ccgr6.cg6_vdoaxiclk = CCM_CGR_OFF; - ccm_ccgr6.cg7_vpu = CCM_CGR_OFF; - - ccm_ccgr6.cg8_reserved = 0; - ccm_ccgr6.cg9_reserved = 0; - ccm_ccgr6.cg10_reserved = 0; - ccm_ccgr6.cg11_reserved = 0; - ccm_ccgr6.cg12_reserved = 0; - ccm_ccgr6.cg13_reserved = 0; - ccm_ccgr6.cg14_reserved = 0; - ccm_ccgr6.cg15_reserved = 0; - - // write register - eim_write_32(CCM_CCGR6, (unsigned int *)&ccm_ccgr6); -} - - -//------------------------------------------------------------------------------ -void _eim_setup_eim() -//------------------------------------------------------------------------------ -{ - // create structures - struct EIM_CS_GCR1 gcr1; - struct EIM_CS_GCR2 gcr2; - struct EIM_CS_RCR1 rcr1; - struct EIM_CS_RCR2 rcr2; - struct EIM_CS_WCR1 wcr1; - struct EIM_CS_WCR2 wcr2; - - struct EIM_WCR wcr; - struct EIM_WIAR wiar; - struct EIM_EAR ear; - - // read all the registers - eim_read_32(EIM_CS0GCR1, (unsigned int *)&gcr1); - eim_read_32(EIM_CS0GCR2, (unsigned int *)&gcr2); - eim_read_32(EIM_CS0RCR1, (unsigned int *)&rcr1); - eim_read_32(EIM_CS0RCR2, (unsigned int *)&rcr2); - eim_read_32(EIM_CS0WCR1, (unsigned int *)&wcr1); - eim_read_32(EIM_CS0WCR2, (unsigned int *)&wcr2); - - eim_read_32(EIM_WCR, (unsigned int *)&wcr); - eim_read_32(EIM_WIAR, (unsigned int *)&wiar); - eim_read_32(EIM_EAR, (unsigned int *)&ear); - - // manipulate registers as needed - gcr1.csen = 1; // chip select is enabled | - gcr1.swr = 1; // write is sync | - gcr1.srd = 1; // read is sync | - gcr1.mum = 1; // address and data are multiplexed | - gcr1.wfl = 0; // write latency is not fixed | - gcr1.rfl = 0; // read latency is not fixed | - gcr1.cre = 0; // CRE signal not needed | - //gcr1.crep = x; // don't care, CRE not used | - gcr1.bl = 4; // burst length | ? - gcr1.wc = 0; // write is not continuous | ? - gcr1.bcd = 3; // BCLK divisor is 3+1=4 | - gcr1.bcs = 1; // delay from ~CS to BCLK is 1 cycle | - gcr1.dsz = 1; // 16 bits per databeat at DATA[15:0] | - gcr1.sp = 0; // supervisor protection is disabled | - gcr1.csrec = 1; // ~CS recovery is 1 cycle | - gcr1.aus = 1; // address is not shifted | - gcr1.gbc = 1; // ~CS gap is 1 cycle | - gcr1.wp = 0; // write protection is not enabled | - //gcr1.psz = x; // don't care, page mode is not used | - - gcr2.adh = 0; // address hold duration is 1 cycle | - //gcr2.daps = x; // don't care, DTACK is not used | - gcr2.dae = 0; // DTACK is not used | - //gcr2.dap = x; // don't care, DTACK is not used | - gcr2.mux16_byp_grant = 1; // enable grant mechanism | ? - gcr2.reserved_3_2 = 0; // must be 0 | - gcr2.reserved_11_10 = 0; // must be 0 | - gcr2.reserved_31_13 = 0; // must be 0 | - - //rcr1.rcsn = x; // don't care in sync mode | - rcr1.rcsa = 0; // no delay for ~CS needed | - //rcr1.oen = x; // don't care in sync mode | - rcr1.oea = 0; // no delay for ~OE needed | - rcr1.radvn = 0; // no delay for ~LBA needed | - rcr1.ral = 0; // clear ~LBA when needed | - rcr1.radva = 0; // no delay for ~LBA needed | - rcr1.rwsc = 1; // one wait state | - rcr1.reserved_3 = 0; // must be 0 | - rcr1.reserved_7 = 0; // must be 0 | - rcr1.reserved_11 = 0; // must be 0 | - rcr1.reserved_15 = 0; // must be 0 | - rcr1.reserved_23 = 0; // must be 0 | - rcr1.reserved_31_30 = 0; // must be 0 | - - //rcr2.rben = x; // don't care in sync mode | - rcr2.rbe = 0; // BE is disabled | - //rcr2.rbea = x; // don't care when BE is not used | - rcr2.rl = 0; // read latency is 0 | ? - //rcr2.pat = x; // don't care when page read is not used | - rcr2.apr = 0; // page read mode is not used | - rcr2.reserved_7 = 0; // must be 0 | - rcr2.reserved_11_10 = 0; // must be 0 | - rcr2.reserved_31_16 = 0; // must be 0 | - - //wcr1.wcsn = x; // don't care in sync mode | - wcr1.wcsa = 0; // no delay for ~CS needed | - //wcr1.wen = x; // don't care in sync mode | - wcr1.wea = 0; // no delay for ~WR_N needed | - //wcr1.wben = x; // don't care in sync mode | - //wcr1.wbea = x; // don't care in sync mode | - wcr1.wadvn = 0; // no delay for ~LBA needed | - wcr1.wadva = 0; // no delay for ~LBA needed | - wcr1.wwsc = 1; // no wait state in needed | - wcr1.wbed = 1; // BE is disabled | - wcr1.wal = 0; // clear ~LBA when needed | - - wcr2.wbcdd = 0; // write clock division is not needed | - wcr2.reserved_31_1 = 0; // must be 0 | - - wcr.bcm = 0; // clock is only active during access | - //wcr.gbcd = x; // don't care when BCM=0 | - wcr.inten = 0; // interrupt is not used | - //wcr.intpol = x; // don't care when interrupt is not used | - wcr.wdog_en = 1; // watchdog is enabled | - wcr.wdog_limit = 00; // timeout is 128 BCLK cycles | - wcr.reserved_3 = 0; // must be 0 | - wcr.reserved_7_6 = 0; // must be 0 | - wcr.reserved_31_11 = 0; // must be 0 | - - wiar.ips_req = 0; // IPS not needed | - wiar.ips_ack = 0; // IPS not needed | - //wiar.irq = x; // don't touch | - //wiar.errst = x; // don't touch | - wiar.aclk_en = 1; // clock is enabled | - wiar.reserved_31_5 = 0; // must be 0 | - - //ear.error_addr = x; // read-only | - - // write modified registers - eim_write_32(EIM_CS0GCR1, (unsigned int *)&gcr1); - eim_write_32(EIM_CS0GCR2, (unsigned int *)&gcr2); - eim_write_32(EIM_CS0RCR1, (unsigned int *)&rcr1); - eim_write_32(EIM_CS0RCR2, (unsigned int *)&rcr2); - eim_write_32(EIM_CS0WCR1, (unsigned int *)&wcr1); - eim_write_32(EIM_CS0WCR2, (unsigned int *)&wcr2); - eim_write_32(EIM_WCR, (unsigned int *)&wcr); - eim_write_32(EIM_WIAR, (unsigned int *)&wiar);/* - eim_write_32(EIM_EAR, (unsigned int *)&ear);*/ -} - - -//------------------------------------------------------------------------------ -void eim_write_32(off_t offset, unsigned int *pvalue) -//------------------------------------------------------------------------------ -{ - // calculate memory offset - unsigned int *ptr = (unsigned int *)_eim_calc_offset(offset); - - // write data to memory - memcpy(ptr, pvalue, sizeof(unsigned int)); -} - -//------------------------------------------------------------------------------ -void eim_read_32(off_t offset, unsigned int *pvalue) -//------------------------------------------------------------------------------ -{ - // calculate memory offset - unsigned int *ptr = (unsigned int *)_eim_calc_offset(offset); - - // read data from memory - memcpy(pvalue, ptr, sizeof(unsigned int)); -} - - -//------------------------------------------------------------------------------ -off_t _eim_calc_offset(off_t offset) -//------------------------------------------------------------------------------ -{ - // make sure that memory is mapped - if (mem_map_ptr == MAP_FAILED) _eim_remap_mem(offset); - - // calculate starting and ending addresses of currently mapped page - off_t offset_low = mem_base_addr; - off_t offset_high = mem_base_addr + (mem_page_size - 1); - - // check that offset is in currently mapped page, remap new page otherwise - if ((offset < offset_low) || (offset > offset_high)) _eim_remap_mem(offset); - - // calculate pointer - return (off_t)mem_map_ptr + (offset - mem_base_addr); -} - - -//------------------------------------------------------------------------------ -void _eim_remap_mem(off_t offset) -//------------------------------------------------------------------------------ -{ - // unmap old memory page if needed - if (mem_map_ptr != MAP_FAILED) - { int ok = munmap(mem_map_ptr, mem_page_size); - if (ok != 0) - { printf("ERROR: munmap() failed.\n"); - exit(EXIT_FAILURE); - } - } - - // calculate starting address of new page - while (offset % mem_page_size) offset--; - - // try to map new memory page - mem_map_ptr = mmap(NULL, mem_page_size, PROT_READ | PROT_WRITE, MAP_SHARED, mem_dev_fd, offset); - if (mem_map_ptr == MAP_FAILED) - { printf("ERROR: mmap() failed.\n"); - exit(EXIT_FAILURE); - } - - // save last mapped page address - mem_base_addr = offset; -} - - -//------------------------------------------------------------------------------ -// End-of-File -//------------------------------------------------------------------------------ +/* + * novena-eim.c + * ------------ + * This module contains the user interface to the Novena EIM bus. + * + * Author: Pavel Shatov + * Copyright (c) 2015, NORDUnet A/S All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of the NORDUnet nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + + +//------------------------------------------------------------------------------ +// Headers +//------------------------------------------------------------------------------ +#include +#include +#include +#include +#include +#include +#include "novena-eim.h" + + +//------------------------------------------------------------------------------ +// Variables +//------------------------------------------------------------------------------ +static long mem_page_size = 0; +static int mem_dev_fd = -1; +static void * mem_map_ptr = MAP_FAILED; +static off_t mem_base_addr = 0; + + +//------------------------------------------------------------------------------ +// Prototypes +//------------------------------------------------------------------------------ +static void _eim_setup_iomuxc (void); +static void _eim_setup_ccm (void); +static void _eim_setup_eim (void); +static void _eim_cleanup (void); +static off_t _eim_calc_offset (off_t); +static void _eim_remap_mem (off_t); + + +//------------------------------------------------------------------------------ +int eim_setup(void) +//------------------------------------------------------------------------------ +{ + // register cleanup function + if (atexit(_eim_cleanup) != 0) { + printf("ERROR: atexit() failed.\n"); + return -1; + } + + // determine memory page size to use in mmap() + mem_page_size = sysconf(_SC_PAGESIZE); + if (mem_page_size < 1) { + printf("ERROR: sysconf(_SC_PAGESIZE) == %ld\n", mem_page_size); + return -1; + } + + // try to open memory device + mem_dev_fd = open(MEMORY_DEVICE, O_RDWR | O_SYNC); + if (mem_dev_fd == -1) { + printf("ERROR: open(%s) failed.\n", MEMORY_DEVICE); + return -1; + } + + /* Several blocks in the CPU have common pins, we can use I/O MUX + * Controller to configure what block will actually use I/O pins. We wait + * EIM module to be able to communicate with the on-board FPGA. Let's + * configure IOMUXC accordingly. + */ + _eim_setup_iomuxc(); + + /* We need to enable clocking of EIM block in order to be able to use it. + * Let's configure Clock Controller Module accordingly. + */ + _eim_setup_ccm(); + + /* We need to properly configure EIM mode and all the corresponding + * parameters. That's a lot of code, let's do it now. + */ + _eim_setup_eim(); + + // done + return 1; +} + + +//------------------------------------------------------------------------------ +static void _eim_cleanup(void) +//------------------------------------------------------------------------------ +{ + // unmap memory if needed + if (mem_map_ptr != MAP_FAILED) { + if (munmap(mem_map_ptr, mem_page_size) != 0) + printf("WARNING: munmap() failed.\n"); + } + + // close memory device if needed + if (mem_dev_fd != -1) { + if (close(mem_dev_fd) != 0) + printf("WARNING: close() failed.\n"); + } +} + + +//------------------------------------------------------------------------------ +static void _eim_setup_iomuxc(void) +//------------------------------------------------------------------------------ +{ + // create structures + struct IOMUXC_SW_MUX_CTL_PAD_EIM reg_mux; // mux control register + struct IOMUXC_SW_PAD_CTL_PAD_EIM reg_pad; // pad control register + + // setup mux control register + reg_mux.mux_mode = IOMUXC_MUX_MODE_ALT0; // ALT0 mode must be used for EIM + reg_mux.sion = 0; // forced input not needed + reg_mux.reserved_3 = 0; // must be 0 + reg_mux.reserved_31_5 = 0; // must be 0 + + // setup pad control register + reg_pad.sre = IOMUXC_PAD_CTL_SRE_FAST; // fast slew rate + reg_pad.dse = IOMUXC_PAD_CTL_DSE_33_OHM; // highest drive strength + reg_pad.speed = IOMUXC_PAD_CTL_SPEED_MEDIUM_10; // medium speed + reg_pad.ode = IOMUXC_PAD_CTL_ODE_DISABLED; // open drain not needed + reg_pad.pke = IOMUXC_PAD_CTL_PKE_DISABLED; // neither pull nor keeper are needed + reg_pad.pue = IOMUXC_PAD_CTL_PUE_PULL; // doesn't matter actually, because PKE is disabled + reg_pad.pus = IOMUXC_PAD_CTL_PUS_100K_OHM_PU; // doesn't matter actually, because PKE is disabled + reg_pad.hys = IOMUXC_PAD_CTL_HYS_DISABLED; // use CMOS, not Schmitt trigger input + reg_pad.reserved_2_1 = 0; // must be 0 + reg_pad.reserved_10_8 = 0; // must be 0 + reg_pad.reserved_31_17 = 0; // must be 0 + + // all the pins must be configured to use the same ALT0 mode + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_CS0_B, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_OE_B, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_RW, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_LBA_B, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD00, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD01, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD02, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD03, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD04, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD05, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD06, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD07, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD08, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD09, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD10, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD11, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD12, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD13, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD14, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD15, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_WAIT_B, (unsigned int *)®_mux); + eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK, (unsigned int *)®_mux); + + // we need to configure all the I/O pads too + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_CS0_B, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_OE_B, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_RW, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_LBA_B, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD00, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD01, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD02, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD03, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD04, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD05, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD06, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD07, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD08, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD09, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD10, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD11, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD12, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD13, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD14, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD15, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_WAIT_B, (unsigned int *)®_pad); + eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK, (unsigned int *)®_pad); +} + + +//------------------------------------------------------------------------------ +static void _eim_setup_ccm(void) +//------------------------------------------------------------------------------ +{ + // create structure + struct CCM_CCGR6 ccm_ccgr6; + + // read register + eim_read_32(CCM_CCGR6, (unsigned int *)&ccm_ccgr6); + + // modify register + ccm_ccgr6.cg0_usboh3 = CCM_CGR_ON_EXCEPT_STOP; + ccm_ccgr6.cg1_usdhc1 = CCM_CGR_OFF; + ccm_ccgr6.cg2_usdhc2 = CCM_CGR_ON_EXCEPT_STOP; + ccm_ccgr6.cg3_usdhc3 = CCM_CGR_ON_EXCEPT_STOP; + + ccm_ccgr6.cg3_usdhc4 = CCM_CGR_OFF; + ccm_ccgr6.cg5_eim_slow = CCM_CGR_ON_EXCEPT_STOP; + ccm_ccgr6.cg6_vdoaxiclk = CCM_CGR_OFF; + ccm_ccgr6.cg7_vpu = CCM_CGR_OFF; + + ccm_ccgr6.cg8_reserved = 0; + ccm_ccgr6.cg9_reserved = 0; + ccm_ccgr6.cg10_reserved = 0; + ccm_ccgr6.cg11_reserved = 0; + ccm_ccgr6.cg12_reserved = 0; + ccm_ccgr6.cg13_reserved = 0; + ccm_ccgr6.cg14_reserved = 0; + ccm_ccgr6.cg15_reserved = 0; + + // write register + eim_write_32(CCM_CCGR6, (unsigned int *)&ccm_ccgr6); +} + + +//------------------------------------------------------------------------------ +static void _eim_setup_eim(void) +//------------------------------------------------------------------------------ +{ + // create structures + struct EIM_CS_GCR1 gcr1; + struct EIM_CS_GCR2 gcr2; + struct EIM_CS_RCR1 rcr1; + struct EIM_CS_RCR2 rcr2; + struct EIM_CS_WCR1 wcr1; + struct EIM_CS_WCR2 wcr2; + + struct EIM_WCR wcr; + struct EIM_WIAR wiar; + //struct EIM_EAR ear; + + // read all the registers + eim_read_32(EIM_CS0GCR1, (unsigned int *)&gcr1); + eim_read_32(EIM_CS0GCR2, (unsigned int *)&gcr2); + eim_read_32(EIM_CS0RCR1, (unsigned int *)&rcr1); + eim_read_32(EIM_CS0RCR2, (unsigned int *)&rcr2); + eim_read_32(EIM_CS0WCR1, (unsigned int *)&wcr1); + eim_read_32(EIM_CS0WCR2, (unsigned int *)&wcr2); + + eim_read_32(EIM_WCR, (unsigned int *)&wcr); + eim_read_32(EIM_WIAR, (unsigned int *)&wiar); + //eim_read_32(EIM_EAR, (unsigned int *)&ear); + + // manipulate registers as needed + gcr1.csen = 1; // chip select is enabled | + gcr1.swr = 1; // write is sync | + gcr1.srd = 1; // read is sync | + gcr1.mum = 1; // address and data are multiplexed | + gcr1.wfl = 0; // write latency is not fixed | + gcr1.rfl = 0; // read latency is not fixed | + gcr1.cre = 0; // CRE signal not needed | + //gcr1.crep = x; // don't care, CRE not used | + gcr1.bl = 4; // burst length | ? + gcr1.wc = 0; // write is not continuous | ? + gcr1.bcd = 3; // BCLK divisor is 3+1=4 | + gcr1.bcs = 1; // delay from ~CS to BCLK is 1 cycle | + gcr1.dsz = 1; // 16 bits per databeat at DATA[15:0] | + gcr1.sp = 0; // supervisor protection is disabled | + gcr1.csrec = 1; // ~CS recovery is 1 cycle | + gcr1.aus = 1; // address is not shifted | + gcr1.gbc = 1; // ~CS gap is 1 cycle | + gcr1.wp = 0; // write protection is not enabled | + //gcr1.psz = x; // don't care, page mode is not used | + + gcr2.adh = 0; // address hold duration is 1 cycle | + //gcr2.daps = x; // don't care, DTACK is not used | + gcr2.dae = 0; // DTACK is not used | + //gcr2.dap = x; // don't care, DTACK is not used | + gcr2.mux16_byp_grant = 1; // enable grant mechanism | ? + gcr2.reserved_3_2 = 0; // must be 0 | + gcr2.reserved_11_10 = 0; // must be 0 | + gcr2.reserved_31_13 = 0; // must be 0 | + + //rcr1.rcsn = x; // don't care in sync mode | + rcr1.rcsa = 0; // no delay for ~CS needed | + //rcr1.oen = x; // don't care in sync mode | + rcr1.oea = 0; // no delay for ~OE needed | + rcr1.radvn = 0; // no delay for ~LBA needed | + rcr1.ral = 0; // clear ~LBA when needed | + rcr1.radva = 0; // no delay for ~LBA needed | + rcr1.rwsc = 1; // one wait state | + rcr1.reserved_3 = 0; // must be 0 | + rcr1.reserved_7 = 0; // must be 0 | + rcr1.reserved_11 = 0; // must be 0 | + rcr1.reserved_15 = 0; // must be 0 | + rcr1.reserved_23 = 0; // must be 0 | + rcr1.reserved_31_30 = 0; // must be 0 | + + //rcr2.rben = x; // don't care in sync mode | + rcr2.rbe = 0; // BE is disabled | + //rcr2.rbea = x; // don't care when BE is not used | + rcr2.rl = 0; // read latency is 0 | ? + //rcr2.pat = x; // don't care when page read is not used | + rcr2.apr = 0; // page read mode is not used | + rcr2.reserved_7 = 0; // must be 0 | + rcr2.reserved_11_10 = 0; // must be 0 | + rcr2.reserved_31_16 = 0; // must be 0 | + + //wcr1.wcsn = x; // don't care in sync mode | + wcr1.wcsa = 0; // no delay for ~CS needed | + //wcr1.wen = x; // don't care in sync mode | + wcr1.wea = 0; // no delay for ~WR_N needed | + //wcr1.wben = x; // don't care in sync mode | + //wcr1.wbea = x; // don't care in sync mode | + wcr1.wadvn = 0; // no delay for ~LBA needed | + wcr1.wadva = 0; // no delay for ~LBA needed | + wcr1.wwsc = 1; // no wait state in needed | + wcr1.wbed = 1; // BE is disabled | + wcr1.wal = 0; // clear ~LBA when needed | + + wcr2.wbcdd = 0; // write clock division is not needed | + wcr2.reserved_31_1 = 0; // must be 0 | + + wcr.bcm = 0; // clock is only active during access | + //wcr.gbcd = x; // don't care when BCM=0 | + wcr.inten = 0; // interrupt is not used | + //wcr.intpol = x; // don't care when interrupt is not used | + wcr.wdog_en = 1; // watchdog is enabled | + wcr.wdog_limit = 00; // timeout is 128 BCLK cycles | + wcr.reserved_3 = 0; // must be 0 | + wcr.reserved_7_6 = 0; // must be 0 | + wcr.reserved_31_11 = 0; // must be 0 | + + wiar.ips_req = 0; // IPS not needed | + wiar.ips_ack = 0; // IPS not needed | + //wiar.irq = x; // don't touch | + //wiar.errst = x; // don't touch | + wiar.aclk_en = 1; // clock is enabled | + wiar.reserved_31_5 = 0; // must be 0 | + + //ear.error_addr = x; // read-only | + + // write modified registers + eim_write_32(EIM_CS0GCR1, (unsigned int *)&gcr1); + eim_write_32(EIM_CS0GCR2, (unsigned int *)&gcr2); + eim_write_32(EIM_CS0RCR1, (unsigned int *)&rcr1); + eim_write_32(EIM_CS0RCR2, (unsigned int *)&rcr2); + eim_write_32(EIM_CS0WCR1, (unsigned int *)&wcr1); + eim_write_32(EIM_CS0WCR2, (unsigned int *)&wcr2); + eim_write_32(EIM_WCR, (unsigned int *)&wcr); + eim_write_32(EIM_WIAR, (unsigned int *)&wiar); + //eim_write_32(EIM_EAR, (unsigned int *)&ear); +} + + +//------------------------------------------------------------------------------ +void eim_write_32(off_t offset, unsigned int *pvalue) +//------------------------------------------------------------------------------ +{ + // calculate memory offset + unsigned int *ptr = (unsigned int *)_eim_calc_offset(offset); + + // write data to memory + memcpy(ptr, pvalue, sizeof(unsigned int)); +} + + +//------------------------------------------------------------------------------ +void eim_read_32(off_t offset, unsigned int *pvalue) +//------------------------------------------------------------------------------ +{ + // calculate memory offset + unsigned int *ptr = (unsigned int *)_eim_calc_offset(offset); + + // read data from memory + memcpy(pvalue, ptr, sizeof(unsigned int)); +} + + +//------------------------------------------------------------------------------ +static off_t _eim_calc_offset(off_t offset) +//------------------------------------------------------------------------------ +{ + // calculate starting and ending addresses of currently mapped page + off_t offset_low = mem_base_addr; + off_t offset_high = mem_base_addr + (mem_page_size - 1); + + // make sure that memory is mapped + if (mem_map_ptr == MAP_FAILED) + _eim_remap_mem(offset); + + // check that offset is in currently mapped page, remap new page otherwise + if ((offset < offset_low) || (offset > offset_high)) + _eim_remap_mem(offset); + + // calculate pointer + return (off_t)mem_map_ptr + (offset - mem_base_addr); +} + + +//------------------------------------------------------------------------------ +static void _eim_remap_mem(off_t offset) +//------------------------------------------------------------------------------ +{ + // unmap old memory page if needed + if (mem_map_ptr != MAP_FAILED) { + if (munmap(mem_map_ptr, mem_page_size) != 0) { + printf("ERROR: munmap() failed.\n"); + exit(EXIT_FAILURE); + } + } + + // calculate starting address of new page + while (offset % mem_page_size) + offset--; + + // try to map new memory page + mem_map_ptr = mmap(NULL, mem_page_size, PROT_READ | PROT_WRITE, + MAP_SHARED, mem_dev_fd, offset); + if (mem_map_ptr == MAP_FAILED) { + printf("ERROR: mmap() failed.\n"); + exit(EXIT_FAILURE); + } + + // save last mapped page address + mem_base_addr = offset; +} + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ diff --git a/sw/test-adder/novena-eim.h b/sw/test-adder/novena-eim.h index fdcf5a5..5a90618 100644 --- a/sw/test-adder/novena-eim.h +++ b/sw/test-adder/novena-eim.h @@ -1,297 +1,321 @@ -//------------------------------------------------------------------------------ -// novena-eim.h -//------------------------------------------------------------------------------ - - -//------------------------------------------------------------------------------ -// Defined Values -//------------------------------------------------------------------------------ -#define MEMORY_DEVICE "/dev/mem" - - -//------------------------------------------------------------------------------ -// IOMUXC Values -//------------------------------------------------------------------------------ -#define IOMUXC_MUX_MODE_ALT0 0 // 000 - -#define IOMUXC_PAD_CTL_SRE_FAST 1 // 1 -#define IOMUXC_PAD_CTL_DSE_33_OHM 7 // 111 -#define IOMUXC_PAD_CTL_SPEED_MEDIUM_10 2 // 10 -#define IOMUXC_PAD_CTL_ODE_DISABLED 0 // 0 -#define IOMUXC_PAD_CTL_PKE_DISABLED 0 // 0 -#define IOMUXC_PAD_CTL_PUE_PULL 1 // 1 -#define IOMUXC_PAD_CTL_PUS_100K_OHM_PU 2 // 10 -#define IOMUXC_PAD_CTL_HYS_DISABLED 0 // 0 - -//------------------------------------------------------------------------------ -// CCM Values -//------------------------------------------------------------------------------ -#define CCM_CGR_OFF 0 // 00 -#define CCM_CGR_ON_EXCEPT_STOP 3 // 11 - - -//------------------------------------------------------------------------------ -// CPU Registers -//------------------------------------------------------------------------------ -enum IMX6DQ_REGISTER_OFFSET -{ - IOMUXC_SW_MUX_CTL_PAD_EIM_CS0_B = 0x020E00F8, - IOMUXC_SW_MUX_CTL_PAD_EIM_OE_B = 0x020E0100, - IOMUXC_SW_MUX_CTL_PAD_EIM_RW = 0x020E0104, - IOMUXC_SW_MUX_CTL_PAD_EIM_LBA_B = 0x020E0108, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD00 = 0x020E0114, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD01 = 0x020E0118, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD02 = 0x020E011C, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD03 = 0x020E0120, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD04 = 0x020E0124, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD05 = 0x020E0128, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD06 = 0x020E012C, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD07 = 0x020E0130, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD08 = 0x020E0134, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD09 = 0x020E0138, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD10 = 0x020E013C, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD11 = 0x020E0140, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD12 = 0x020E0144, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD13 = 0x020E0148, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD14 = 0x020E014C, - IOMUXC_SW_MUX_CTL_PAD_EIM_AD15 = 0x020E0150, - IOMUXC_SW_MUX_CTL_PAD_EIM_WAIT_B = 0x020E0154, - IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK = 0x020E0158, - - IOMUXC_SW_PAD_CTL_PAD_EIM_CS0_B = 0x020E040C, - IOMUXC_SW_PAD_CTL_PAD_EIM_OE_B = 0x020E0414, - IOMUXC_SW_PAD_CTL_PAD_EIM_RW = 0x020E0418, - IOMUXC_SW_PAD_CTL_PAD_EIM_LBA_B = 0x020E041C, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD00 = 0x020E0428, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD01 = 0x020E042C, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD02 = 0x020E0430, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD03 = 0x020E0434, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD04 = 0x020E0438, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD05 = 0x020E043C, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD06 = 0x020E0440, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD07 = 0x020E0444, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD08 = 0x020E0448, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD09 = 0x020E044C, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD10 = 0x020E0450, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD11 = 0x020E0454, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD12 = 0x020E0458, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD13 = 0x020E045C, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD14 = 0x020E0460, - IOMUXC_SW_PAD_CTL_PAD_EIM_AD15 = 0x020E0464, - IOMUXC_SW_PAD_CTL_PAD_EIM_WAIT_B = 0x020E0468, - IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK = 0x020E046C, - - CCM_CCGR6 = 0x020C4080, - - EIM_CS0GCR1 = 0x021B8000, - EIM_CS0GCR2 = 0x021B8004, - EIM_CS0RCR1 = 0x021B8008, - EIM_CS0RCR2 = 0x021B800C, - EIM_CS0WCR1 = 0x021B8010, - EIM_CS0WCR2 = 0x021B8014, - - EIM_WCR = 0x021B8090, - EIM_WIAR = 0x021B8094, - EIM_EAR = 0x021B8098, - - EIM_BASE_ADDR = 0x08000000 -}; - - -//------------------------------------------------------------------------------ -struct IOMUXC_SW_MUX_CTL_PAD_EIM -//------------------------------------------------------------------------------ -{ - unsigned int mux_mode : 3; - unsigned int reserved_3 : 1; - unsigned int sion : 1; - unsigned int reserved_31_5 : 27; -}; -//------------------------------------------------------------------------------ -struct IOMUXC_SW_PAD_CTL_PAD_EIM -//------------------------------------------------------------------------------ -{ - unsigned int sre : 1; - unsigned int reserved_2_1 : 2; - unsigned int dse : 3; - unsigned int speed : 2; - unsigned int reserved_10_8 : 3; - unsigned int ode : 1; - unsigned int pke : 1; - unsigned int pue : 1; - unsigned int pus : 2; - unsigned int hys : 1; - unsigned int reserved_31_17 : 15; -}; - - -//------------------------------------------------------------------------------ -struct CCM_CCGR6 -//------------------------------------------------------------------------------ -{ - unsigned int cg0_usboh3 : 2; - unsigned int cg1_usdhc1 : 2; - unsigned int cg2_usdhc2 : 2; - unsigned int cg3_usdhc3 : 2; - - unsigned int cg3_usdhc4 : 2; - unsigned int cg5_eim_slow : 2; - unsigned int cg6_vdoaxiclk : 2; - unsigned int cg7_vpu : 2; - - unsigned int cg8_reserved : 2; - unsigned int cg9_reserved : 2; - unsigned int cg10_reserved : 2; - unsigned int cg11_reserved : 2; - - unsigned int cg12_reserved : 2; - unsigned int cg13_reserved : 2; - unsigned int cg14_reserved : 2; - unsigned int cg15_reserved : 2; -}; - - -//------------------------------------------------------------------------------ -struct EIM_CS_GCR1 -//------------------------------------------------------------------------------ -{ - unsigned int csen : 1; - unsigned int swr : 1; - unsigned int srd : 1; - unsigned int mum : 1; - unsigned int wfl : 1; - unsigned int rfl : 1; - unsigned int cre : 1; - unsigned int crep : 1; - unsigned int bl : 3; - unsigned int wc : 1; - unsigned int bcd : 2; - unsigned int bcs : 2; - unsigned int dsz : 3; - unsigned int sp : 1; - unsigned int csrec : 3; - unsigned int aus : 1; - unsigned int gbc : 3; - unsigned int wp : 1; - unsigned int psz : 4; -}; -//------------------------------------------------------------------------------ -struct EIM_CS_GCR2 -//------------------------------------------------------------------------------ -{ - unsigned int adh : 2; - unsigned int reserved_3_2 : 2; - unsigned int daps : 4; - unsigned int dae : 1; - unsigned int dap : 1; - unsigned int reserved_11_10 : 2; - unsigned int mux16_byp_grant : 1; - unsigned int reserved_31_13 : 19; -}; -//------------------------------------------------------------------------------ -struct EIM_CS_RCR1 -//------------------------------------------------------------------------------ -{ - unsigned int rcsn : 3; - unsigned int reserved_3 : 1; - unsigned int rcsa : 3; - unsigned int reserved_7 : 1; - unsigned int oen : 3; - unsigned int reserved_11 : 1; - unsigned int oea : 3; - unsigned int reserved_15 : 1; - unsigned int radvn : 3; - unsigned int ral : 1; - unsigned int radva : 3; - unsigned int reserved_23 : 1; - unsigned int rwsc : 6; - unsigned int reserved_31_30 : 2; -}; -//------------------------------------------------------------------------------ -struct EIM_CS_RCR2 -//------------------------------------------------------------------------------ -{ - unsigned int rben : 3; - unsigned int rbe : 1; - unsigned int rbea : 3; - unsigned int reserved_7 : 1; - unsigned int rl : 2; - unsigned int reserved_11_10 : 2; - unsigned int pat : 3; - unsigned int apr : 1; - unsigned int reserved_31_16 : 16; -}; -//------------------------------------------------------------------------------ -struct EIM_CS_WCR1 -//------------------------------------------------------------------------------ -{ - unsigned int wcsn : 3; - unsigned int wcsa : 3; - unsigned int wen : 3; - unsigned int wea : 3; - unsigned int wben : 3; - unsigned int wbea : 3; - unsigned int wadvn : 3; - unsigned int wadva : 3; - unsigned int wwsc : 6; - unsigned int wbed : 1; - unsigned int wal : 1; -}; -//------------------------------------------------------------------------------ -struct EIM_CS_WCR2 -//------------------------------------------------------------------------------ -{ - unsigned int wbcdd : 1; - unsigned int reserved_31_1 : 31; -}; -//------------------------------------------------------------------------------ -struct EIM_WCR -//------------------------------------------------------------------------------ -{ - unsigned int bcm : 1; - unsigned int gbcd : 2; - unsigned int reserved_3 : 1; - unsigned int inten : 1; - unsigned int intpol : 1; - unsigned int reserved_7_6 : 2; - unsigned int wdog_en : 1; - unsigned int wdog_limit : 2; - unsigned int reserved_31_11 : 21; -}; -//------------------------------------------------------------------------------ -struct EIM_WIAR -//------------------------------------------------------------------------------ -{ - unsigned int ips_req : 1; - unsigned int ips_ack : 1; - unsigned int irq : 1; - unsigned int errst : 1; - unsigned int aclk_en : 1; - unsigned int reserved_31_5 : 27; -}; -//------------------------------------------------------------------------------ -struct EIM_EAR -//------------------------------------------------------------------------------ -{ - unsigned int error_addr : 32; -}; - - -//------------------------------------------------------------------------------ -// Prototypes -//------------------------------------------------------------------------------ -int eim_setup (); -void eim_write_32 (off_t, unsigned int *); -void eim_read_32 (off_t, unsigned int *); - -void _eim_setup_iomuxc (); -void _eim_setup_ccm (); -void _eim_setup_eim (); -void _eim_cleanup (); -off_t _eim_calc_offset (off_t); -void _eim_remap_mem (off_t); - - -//------------------------------------------------------------------------------ -// End-of-File -//------------------------------------------------------------------------------ +/* + * novena-eim.h + * ------------ + * This module contains the user interface to the Novena EIM bus. + * + * Author: Pavel Shatov + * Copyright (c) 2015, NORDUnet A/S All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of the NORDUnet nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + + +//------------------------------------------------------------------------------ +// Defined Values +//------------------------------------------------------------------------------ +#define MEMORY_DEVICE "/dev/mem" + + +//------------------------------------------------------------------------------ +// IOMUXC Values +//------------------------------------------------------------------------------ +#define IOMUXC_MUX_MODE_ALT0 0 // 000 + +#define IOMUXC_PAD_CTL_SRE_FAST 1 // 1 +#define IOMUXC_PAD_CTL_DSE_33_OHM 7 // 111 +#define IOMUXC_PAD_CTL_SPEED_MEDIUM_10 2 // 10 +#define IOMUXC_PAD_CTL_ODE_DISABLED 0 // 0 +#define IOMUXC_PAD_CTL_PKE_DISABLED 0 // 0 +#define IOMUXC_PAD_CTL_PUE_PULL 1 // 1 +#define IOMUXC_PAD_CTL_PUS_100K_OHM_PU 2 // 10 +#define IOMUXC_PAD_CTL_HYS_DISABLED 0 // 0 + +//------------------------------------------------------------------------------ +// CCM Values +//------------------------------------------------------------------------------ +#define CCM_CGR_OFF 0 // 00 +#define CCM_CGR_ON_EXCEPT_STOP 3 // 11 + + +//------------------------------------------------------------------------------ +// CPU Registers +//------------------------------------------------------------------------------ +enum IMX6DQ_REGISTER_OFFSET +{ + IOMUXC_SW_MUX_CTL_PAD_EIM_CS0_B = 0x020E00F8, + IOMUXC_SW_MUX_CTL_PAD_EIM_OE_B = 0x020E0100, + IOMUXC_SW_MUX_CTL_PAD_EIM_RW = 0x020E0104, + IOMUXC_SW_MUX_CTL_PAD_EIM_LBA_B = 0x020E0108, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD00 = 0x020E0114, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD01 = 0x020E0118, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD02 = 0x020E011C, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD03 = 0x020E0120, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD04 = 0x020E0124, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD05 = 0x020E0128, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD06 = 0x020E012C, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD07 = 0x020E0130, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD08 = 0x020E0134, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD09 = 0x020E0138, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD10 = 0x020E013C, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD11 = 0x020E0140, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD12 = 0x020E0144, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD13 = 0x020E0148, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD14 = 0x020E014C, + IOMUXC_SW_MUX_CTL_PAD_EIM_AD15 = 0x020E0150, + IOMUXC_SW_MUX_CTL_PAD_EIM_WAIT_B = 0x020E0154, + IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK = 0x020E0158, + + IOMUXC_SW_PAD_CTL_PAD_EIM_CS0_B = 0x020E040C, + IOMUXC_SW_PAD_CTL_PAD_EIM_OE_B = 0x020E0414, + IOMUXC_SW_PAD_CTL_PAD_EIM_RW = 0x020E0418, + IOMUXC_SW_PAD_CTL_PAD_EIM_LBA_B = 0x020E041C, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD00 = 0x020E0428, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD01 = 0x020E042C, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD02 = 0x020E0430, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD03 = 0x020E0434, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD04 = 0x020E0438, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD05 = 0x020E043C, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD06 = 0x020E0440, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD07 = 0x020E0444, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD08 = 0x020E0448, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD09 = 0x020E044C, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD10 = 0x020E0450, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD11 = 0x020E0454, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD12 = 0x020E0458, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD13 = 0x020E045C, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD14 = 0x020E0460, + IOMUXC_SW_PAD_CTL_PAD_EIM_AD15 = 0x020E0464, + IOMUXC_SW_PAD_CTL_PAD_EIM_WAIT_B = 0x020E0468, + IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK = 0x020E046C, + + CCM_CCGR6 = 0x020C4080, + + EIM_CS0GCR1 = 0x021B8000, + EIM_CS0GCR2 = 0x021B8004, + EIM_CS0RCR1 = 0x021B8008, + EIM_CS0RCR2 = 0x021B800C, + EIM_CS0WCR1 = 0x021B8010, + EIM_CS0WCR2 = 0x021B8014, + + EIM_WCR = 0x021B8090, + EIM_WIAR = 0x021B8094, + EIM_EAR = 0x021B8098, + + EIM_BASE_ADDR = 0x08000000 +}; + + +//------------------------------------------------------------------------------ +struct IOMUXC_SW_MUX_CTL_PAD_EIM +//------------------------------------------------------------------------------ +{ + unsigned int mux_mode : 3; + unsigned int reserved_3 : 1; + unsigned int sion : 1; + unsigned int reserved_31_5 : 27; +}; +//------------------------------------------------------------------------------ +struct IOMUXC_SW_PAD_CTL_PAD_EIM +//------------------------------------------------------------------------------ +{ + unsigned int sre : 1; + unsigned int reserved_2_1 : 2; + unsigned int dse : 3; + unsigned int speed : 2; + unsigned int reserved_10_8 : 3; + unsigned int ode : 1; + unsigned int pke : 1; + unsigned int pue : 1; + unsigned int pus : 2; + unsigned int hys : 1; + unsigned int reserved_31_17 : 15; +}; + + +//------------------------------------------------------------------------------ +struct CCM_CCGR6 +//------------------------------------------------------------------------------ +{ + unsigned int cg0_usboh3 : 2; + unsigned int cg1_usdhc1 : 2; + unsigned int cg2_usdhc2 : 2; + unsigned int cg3_usdhc3 : 2; + + unsigned int cg3_usdhc4 : 2; + unsigned int cg5_eim_slow : 2; + unsigned int cg6_vdoaxiclk : 2; + unsigned int cg7_vpu : 2; + + unsigned int cg8_reserved : 2; + unsigned int cg9_reserved : 2; + unsigned int cg10_reserved : 2; + unsigned int cg11_reserved : 2; + + unsigned int cg12_reserved : 2; + unsigned int cg13_reserved : 2; + unsigned int cg14_reserved : 2; + unsigned int cg15_reserved : 2; +}; + + +//------------------------------------------------------------------------------ +struct EIM_CS_GCR1 +//------------------------------------------------------------------------------ +{ + unsigned int csen : 1; + unsigned int swr : 1; + unsigned int srd : 1; + unsigned int mum : 1; + unsigned int wfl : 1; + unsigned int rfl : 1; + unsigned int cre : 1; + unsigned int crep : 1; + unsigned int bl : 3; + unsigned int wc : 1; + unsigned int bcd : 2; + unsigned int bcs : 2; + unsigned int dsz : 3; + unsigned int sp : 1; + unsigned int csrec : 3; + unsigned int aus : 1; + unsigned int gbc : 3; + unsigned int wp : 1; + unsigned int psz : 4; +}; +//------------------------------------------------------------------------------ +struct EIM_CS_GCR2 +//------------------------------------------------------------------------------ +{ + unsigned int adh : 2; + unsigned int reserved_3_2 : 2; + unsigned int daps : 4; + unsigned int dae : 1; + unsigned int dap : 1; + unsigned int reserved_11_10 : 2; + unsigned int mux16_byp_grant : 1; + unsigned int reserved_31_13 : 19; +}; +//------------------------------------------------------------------------------ +struct EIM_CS_RCR1 +//------------------------------------------------------------------------------ +{ + unsigned int rcsn : 3; + unsigned int reserved_3 : 1; + unsigned int rcsa : 3; + unsigned int reserved_7 : 1; + unsigned int oen : 3; + unsigned int reserved_11 : 1; + unsigned int oea : 3; + unsigned int reserved_15 : 1; + unsigned int radvn : 3; + unsigned int ral : 1; + unsigned int radva : 3; + unsigned int reserved_23 : 1; + unsigned int rwsc : 6; + unsigned int reserved_31_30 : 2; +}; +//------------------------------------------------------------------------------ +struct EIM_CS_RCR2 +//------------------------------------------------------------------------------ +{ + unsigned int rben : 3; + unsigned int rbe : 1; + unsigned int rbea : 3; + unsigned int reserved_7 : 1; + unsigned int rl : 2; + unsigned int reserved_11_10 : 2; + unsigned int pat : 3; + unsigned int apr : 1; + unsigned int reserved_31_16 : 16; +}; +//------------------------------------------------------------------------------ +struct EIM_CS_WCR1 +//------------------------------------------------------------------------------ +{ + unsigned int wcsn : 3; + unsigned int wcsa : 3; + unsigned int wen : 3; + unsigned int wea : 3; + unsigned int wben : 3; + unsigned int wbea : 3; + unsigned int wadvn : 3; + unsigned int wadva : 3; + unsigned int wwsc : 6; + unsigned int wbed : 1; + unsigned int wal : 1; +}; +//------------------------------------------------------------------------------ +struct EIM_CS_WCR2 +//------------------------------------------------------------------------------ +{ + unsigned int wbcdd : 1; + unsigned int reserved_31_1 : 31; +}; +//------------------------------------------------------------------------------ +struct EIM_WCR +//------------------------------------------------------------------------------ +{ + unsigned int bcm : 1; + unsigned int gbcd : 2; + unsigned int reserved_3 : 1; + unsigned int inten : 1; + unsigned int intpol : 1; + unsigned int reserved_7_6 : 2; + unsigned int wdog_en : 1; + unsigned int wdog_limit : 2; + unsigned int reserved_31_11 : 21; +}; +//------------------------------------------------------------------------------ +struct EIM_WIAR +//------------------------------------------------------------------------------ +{ + unsigned int ips_req : 1; + unsigned int ips_ack : 1; + unsigned int irq : 1; + unsigned int errst : 1; + unsigned int aclk_en : 1; + unsigned int reserved_31_5 : 27; +}; +//------------------------------------------------------------------------------ +struct EIM_EAR +//------------------------------------------------------------------------------ +{ + unsigned int error_addr : 32; +}; + + +//------------------------------------------------------------------------------ +// Prototypes +//------------------------------------------------------------------------------ +int eim_setup (void); +void eim_write_32 (off_t, unsigned int *); +void eim_read_32 (off_t, unsigned int *); + + +//------------------------------------------------------------------------------ +// End-of-File +//------------------------------------------------------------------------------ diff --git a/sw/test-adder/test-adder.c b/sw/test-adder/test-adder.c index 70415d8..88d4353 100644 --- a/sw/test-adder/test-adder.c +++ b/sw/test-adder/test-adder.c @@ -1,6 +1,38 @@ -//------------------------------------------------------------------------------ -// setup-eim.c -//------------------------------------------------------------------------------ +/* + * test-adder.c + * ------------ + * This program tests the Novena EIM interface by repeatedly writing + * two 32-bit values to the FPGA, and reading back the sum. + * + * Author: Pavel Shatov + * Copyright (c) 2015, NORDUnet A/S All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of the NORDUnet nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ //------------------------------------------------------------------------------ @@ -14,70 +46,74 @@ //------------------------------------------------------------------------------ // Demo Adder //------------------------------------------------------------------------------ -#define DEMO_ADDER_BASE_ADDR (0x3210) -#define DEMO_ADDER_REG_X (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (0<<2)) -#define DEMO_ADDER_REG_Y (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (1<<2)) -#define DEMO_ADDER_REG_Z (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (2<<2)) -#define DEMO_ADDER_REG_SC (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (3<<2)) +#define DEMO_ADDER_BASE_ADDR (0x3210) +#define DEMO_ADDER_REG_X (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (0<<2)) +#define DEMO_ADDER_REG_Y (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (1<<2)) +#define DEMO_ADDER_REG_Z (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (2<<2)) +#define DEMO_ADDER_REG_SC (EIM_BASE_ADDR + DEMO_ADDER_BASE_ADDR + (3<<2)) //------------------------------------------------------------------------------ // Prototypes //------------------------------------------------------------------------------ -unsigned int demo_adder_test_round (unsigned int, unsigned int); -unsigned int lfsr_next_x (unsigned int); -unsigned int lfsr_next_y (unsigned int); +unsigned int demo_adder_test_round (unsigned int, unsigned int); +unsigned int lfsr_next_x (unsigned int); +unsigned int lfsr_next_y (unsigned int); //------------------------------------------------------------------------------ // Testing Parameters //------------------------------------------------------------------------------ -const int NUM_TEST_ROUNDS = 10000; -const int PRINT_XYZ_VALUES = 1; +const int NUM_TEST_ROUNDS = 10000; +const int PRINT_XYZ_VALUES = 1; //------------------------------------------------------------------------------ -int main() +int main(void) //------------------------------------------------------------------------------ { - // try to setup eim (return value should be 1) - printf("Configuring EIM .. "); - int ok = eim_setup(); - if (ok < 1) - { printf("ERROR\n"); - return EXIT_FAILURE; - } - else printf("OK\n"); - - // run test - int i; - unsigned int x = 0x12341234, y = 0xABCDABCD, zyx; - printf("Testing started.\n"); - for (i=0; i>= 16; - if (sts != ctl) - { printf("ERROR: Adder timeout!\n"); - exit(EXIT_FAILURE); - } - - // read z - unsigned int z; - eim_read_32(DEMO_ADDER_REG_Z, &z); - - // uncomment to trigger an error - /** - z++; - **/ - - // done - return z; + unsigned int ctl; + unsigned int sts; + unsigned int z; + + // write x + eim_write_32(DEMO_ADDER_REG_X, &x); + + // write y + eim_write_32(DEMO_ADDER_REG_Y, &y); + + /* To make adder calculate something we need to change its control + * register, so we read it, increment and write back. Control register is + * in the lower 16 bits. + */ + eim_read_32(DEMO_ADDER_REG_SC, &ctl); + ctl += 1; + ctl &= 0x0000FFFF; + eim_write_32(DEMO_ADDER_REG_SC, &ctl); + + /* When adder is done, it will write new control value into its status + * register. Adder has 1-cycle latency which is very small, we don't even + * need to poll, just check that status was updated. Status register is in + * the upper 16 bits. + */ + eim_read_32(DEMO_ADDER_REG_SC, &sts); + sts >>= 16; + if (sts != ctl) + { printf("ERROR: Adder timeout!\n"); + exit(EXIT_FAILURE); + } + + // read z + eim_read_32(DEMO_ADDER_REG_Z, &z); + + // uncomment to trigger an error + //z++; + + // done + return z; } @@ -130,36 +167,36 @@ unsigned int demo_adder_test_round(unsigned int x, unsigned int y) unsigned int lfsr_next_x(unsigned int value) //------------------------------------------------------------------------------ { - // - // [32, 31, 29, 28, 27, 25, 24, 23, 21, 19, 17, 14, 10, 6, 4, 2] - // 0 1 3 4 5 7 8 9 11 13 15 18 22 24 28 30 - // - - unsigned int carry = 0; - - carry ^= (value >> 0); - carry ^= (value >> 1); - carry ^= (value >> 3); - carry ^= (value >> 4); - - carry ^= (value >> 5); - carry ^= (value >> 7); - carry ^= (value >> 8); - carry ^= (value >> 9); - - carry ^= (value >> 11); - carry ^= (value >> 13); - carry ^= (value >> 15); - carry ^= (value >> 18); - - carry ^= (value >> 22); - carry ^= (value >> 24); - carry ^= (value >> 28); - carry ^= (value >> 30); - - value >>= 1, value |= (carry << 31); - - return value; + // + // [32, 31, 29, 28, 27, 25, 24, 23, 21, 19, 17, 14, 10, 6, 4, 2] + // 0 1 3 4 5 7 8 9 11 13 15 18 22 24 28 30 + // + + unsigned int carry = 0; + + carry ^= (value >> 0); + carry ^= (value >> 1); + carry ^= (value >> 3); + carry ^= (value >> 4); + + carry ^= (value >> 5); + carry ^= (value >> 7); + carry ^= (value >> 8); + carry ^= (value >> 9); + + carry ^= (value >> 11); + carry ^= (value >> 13); + carry ^= (value >> 15); + carry ^= (value >> 18); + + carry ^= (value >> 22); + carry ^= (value >> 24); + carry ^= (value >> 28); + carry ^= (value >> 30); + + value >>= 1, value |= (carry << 31); + + return value; } @@ -167,37 +204,37 @@ unsigned int lfsr_next_x(unsigned int value) unsigned int lfsr_next_y(unsigned int value) //------------------------------------------------------------------------------ { - // - // [32, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 1] - // 0 15 16 17 18 19 20 21 22 23 24 25 26 27 28 31 - // - - unsigned int carry = 0; - - carry ^= (value >> 0); - carry ^= (value >> 15); - carry ^= (value >> 16); - carry ^= (value >> 17); - - carry ^= (value >> 18); - carry ^= (value >> 19); - carry ^= (value >> 20); - carry ^= (value >> 21); - - carry ^= (value >> 22); - carry ^= (value >> 23); - carry ^= (value >> 24); - carry ^= (value >> 25); - - carry ^= (value >> 26); - carry ^= (value >> 27); - carry ^= (value >> 28); - carry ^= (value >> 31); - - value >>= 1, value |= (carry << 31); - - return value; -} + // + // [32, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 1] + // 0 15 16 17 18 19 20 21 22 23 24 25 26 27 28 31 + // + + unsigned int carry = 0; + + carry ^= (value >> 0); + carry ^= (value >> 15); + carry ^= (value >> 16); + carry ^= (value >> 17); + + carry ^= (value >> 18); + carry ^= (value >> 19); + carry ^= (value >> 20); + carry ^= (value >> 21); + + carry ^= (value >> 22); + carry ^= (value >> 23); + carry ^= (value >> 24); + carry ^= (value >> 25); + + carry ^= (value >> 26); + carry ^= (value >> 27); + carry ^= (value >> 28); + carry ^= (value >> 31); + + value >>= 1, value |= (carry << 31); + + return value; +} -- cgit v1.2.3