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litex/software/bios/main.c

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#include <stdio.h>
#include <stdlib.h>
#include <console.h>
#include <string.h>
#include <uart.h>
#include <system.h>
#include <id.h>
#include <irq.h>
#include <crc.h>
#include <generated/csr.h>
#include <generated/mem.h>
#include <net/microudp.h>
#include "sdram.h"
#include "dataflow.h"
#include "boot.h"
/* General address space functions */
#define NUMBER_OF_BYTES_ON_A_LINE 16
static void dump_bytes(unsigned int *ptr, int count, unsigned addr)
{
char *data = (char *)ptr;
int line_bytes = 0, i = 0;
putsnonl("Memory dump:");
while(count > 0){
line_bytes =
(count > NUMBER_OF_BYTES_ON_A_LINE)?
NUMBER_OF_BYTES_ON_A_LINE : count;
printf("\n0x%08x ", addr);
for(i=0;i<line_bytes;i++)
printf("%02x ", *(unsigned char *)(data+i));
for(;i<NUMBER_OF_BYTES_ON_A_LINE;i++)
printf(" ");
printf(" ");
for(i=0;i<line_bytes;i++) {
if((*(data+i) < 0x20) || (*(data+i) > 0x7e))
printf(".");
else
printf("%c", *(data+i));
}
for(;i<NUMBER_OF_BYTES_ON_A_LINE;i++)
printf(" ");
data += (char)line_bytes;
count -= line_bytes;
addr += line_bytes;
}
printf("\n");
}
static void mr(char *startaddr, char *len)
{
char *c;
unsigned int *addr;
unsigned int length;
if(*startaddr == 0) {
printf("mr <address> [length]\n");
return;
}
addr = (unsigned *)strtoul(startaddr, &c, 0);
if(*c != 0) {
printf("incorrect address\n");
return;
}
if(*len == 0) {
length = 4;
} else {
length = strtoul(len, &c, 0);
if(*c != 0) {
printf("incorrect length\n");
return;
}
}
dump_bytes(addr, length, (unsigned)addr);
}
static void mw(char *addr, char *value, char *count)
{
char *c;
unsigned int *addr2;
unsigned int value2;
unsigned int count2;
unsigned int i;
if((*addr == 0) || (*value == 0)) {
printf("mw <address> <value> [count]\n");
return;
}
addr2 = (unsigned int *)strtoul(addr, &c, 0);
if(*c != 0) {
printf("incorrect address\n");
return;
}
value2 = strtoul(value, &c, 0);
if(*c != 0) {
printf("incorrect value\n");
return;
}
if(*count == 0) {
count2 = 1;
} else {
count2 = strtoul(count, &c, 0);
if(*c != 0) {
printf("incorrect count\n");
return;
}
}
for (i=0;i<count2;i++) *addr2++ = value2;
}
static void mc(char *dstaddr, char *srcaddr, char *count)
{
char *c;
unsigned int *dstaddr2;
unsigned int *srcaddr2;
unsigned int count2;
unsigned int i;
if((*dstaddr == 0) || (*srcaddr == 0)) {
printf("mc <dst> <src> [count]\n");
return;
}
dstaddr2 = (unsigned int *)strtoul(dstaddr, &c, 0);
if(*c != 0) {
printf("incorrect destination address\n");
return;
}
srcaddr2 = (unsigned int *)strtoul(srcaddr, &c, 0);
if(*c != 0) {
printf("incorrect source address\n");
return;
}
if(*count == 0) {
count2 = 1;
} else {
count2 = strtoul(count, &c, 0);
if(*c != 0) {
printf("incorrect count\n");
return;
}
}
for (i=0;i<count2;i++) *dstaddr2++ = *srcaddr2++;
}
static void crc(char *startaddr, char *len)
{
char *c;
char *addr;
unsigned int length;
if((*startaddr == 0)||(*len == 0)) {
printf("crc <address> <length>\n");
return;
}
addr = (char *)strtoul(startaddr, &c, 0);
if(*c != 0) {
printf("incorrect address\n");
return;
}
length = strtoul(len, &c, 0);
if(*c != 0) {
printf("incorrect length\n");
return;
}
printf("CRC32: %08x\n", crc32((unsigned char *)addr, length));
}
#ifdef __lm32__
enum {
CSR_IE = 1, CSR_IM, CSR_IP, CSR_ICC, CSR_DCC, CSR_CC, CSR_CFG, CSR_EBA,
CSR_DC, CSR_DEBA, CSR_JTX, CSR_JRX, CSR_BP0, CSR_BP1, CSR_BP2, CSR_BP3,
CSR_WP0, CSR_WP1, CSR_WP2, CSR_WP3,
};
/* processor registers */
static int parse_csr(const char *csr)
{
if(!strcmp(csr, "ie")) return CSR_IE;
if(!strcmp(csr, "im")) return CSR_IM;
if(!strcmp(csr, "ip")) return CSR_IP;
if(!strcmp(csr, "icc")) return CSR_ICC;
if(!strcmp(csr, "dcc")) return CSR_DCC;
if(!strcmp(csr, "cc")) return CSR_CC;
if(!strcmp(csr, "cfg")) return CSR_CFG;
if(!strcmp(csr, "eba")) return CSR_EBA;
if(!strcmp(csr, "dc")) return CSR_DC;
if(!strcmp(csr, "deba")) return CSR_DEBA;
if(!strcmp(csr, "jtx")) return CSR_JTX;
if(!strcmp(csr, "jrx")) return CSR_JRX;
if(!strcmp(csr, "bp0")) return CSR_BP0;
if(!strcmp(csr, "bp1")) return CSR_BP1;
if(!strcmp(csr, "bp2")) return CSR_BP2;
if(!strcmp(csr, "bp3")) return CSR_BP3;
if(!strcmp(csr, "wp0")) return CSR_WP0;
if(!strcmp(csr, "wp1")) return CSR_WP1;
if(!strcmp(csr, "wp2")) return CSR_WP2;
if(!strcmp(csr, "wp3")) return CSR_WP3;
return 0;
}
static void rcsr(char *csr)
{
unsigned int csr2;
register unsigned int value;
if(*csr == 0) {
printf("rcsr <csr>\n");
return;
}
csr2 = parse_csr(csr);
if(csr2 == 0) {
printf("incorrect csr\n");
return;
}
switch(csr2) {
case CSR_IE: asm volatile ("rcsr %0,ie":"=r"(value)); break;
case CSR_IM: asm volatile ("rcsr %0,im":"=r"(value)); break;
case CSR_IP: asm volatile ("rcsr %0,ip":"=r"(value)); break;
case CSR_CC: asm volatile ("rcsr %0,cc":"=r"(value)); break;
case CSR_CFG: asm volatile ("rcsr %0,cfg":"=r"(value)); break;
case CSR_EBA: asm volatile ("rcsr %0,eba":"=r"(value)); break;
case CSR_DEBA: asm volatile ("rcsr %0,deba":"=r"(value)); break;
case CSR_JTX: asm volatile ("rcsr %0,jtx":"=r"(value)); break;
case CSR_JRX: asm volatile ("rcsr %0,jrx":"=r"(value)); break;
default: printf("csr write only\n"); return;
}
printf("%08x\n", value);
}
static void wcsr(char *csr, char *value)
{
char *c;
unsigned int csr2;
register unsigned int value2;
if((*csr == 0) || (*value == 0)) {
printf("wcsr <csr> <address>\n");
return;
}
csr2 = parse_csr(csr);
if(csr2 == 0) {
printf("incorrect csr\n");
return;
}
value2 = strtoul(value, &c, 0);
if(*c != 0) {
printf("incorrect value\n");
return;
}
switch(csr2) {
case CSR_IE: asm volatile ("wcsr ie,%0"::"r"(value2)); break;
case CSR_IM: asm volatile ("wcsr im,%0"::"r"(value2)); break;
case CSR_ICC: asm volatile ("wcsr icc,%0"::"r"(value2)); break;
case CSR_DCC: asm volatile ("wcsr dcc,%0"::"r"(value2)); break;
case CSR_EBA: asm volatile ("wcsr eba,%0"::"r"(value2)); break;
case CSR_DC: asm volatile ("wcsr dcc,%0"::"r"(value2)); break;
case CSR_DEBA: asm volatile ("wcsr deba,%0"::"r"(value2)); break;
case CSR_JTX: asm volatile ("wcsr jtx,%0"::"r"(value2)); break;
case CSR_JRX: asm volatile ("wcsr jrx,%0"::"r"(value2)); break;
case CSR_BP0: asm volatile ("wcsr bp0,%0"::"r"(value2)); break;
case CSR_BP1: asm volatile ("wcsr bp1,%0"::"r"(value2)); break;
case CSR_BP2: asm volatile ("wcsr bp2,%0"::"r"(value2)); break;
case CSR_BP3: asm volatile ("wcsr bp3,%0"::"r"(value2)); break;
case CSR_WP0: asm volatile ("wcsr wp0,%0"::"r"(value2)); break;
case CSR_WP1: asm volatile ("wcsr wp1,%0"::"r"(value2)); break;
case CSR_WP2: asm volatile ("wcsr wp2,%0"::"r"(value2)); break;
case CSR_WP3: asm volatile ("wcsr wp3,%0"::"r"(value2)); break;
default: printf("csr read only\n"); return;
}
}
#endif /* __lm32__ */
static void dfs(char *baseaddr)
{
char *c;
unsigned int addr;
if(*baseaddr == 0) {
printf("dfs <address>\n");
return;
}
addr = strtoul(baseaddr, &c, 0);
if(*c != 0) {
printf("incorrect address\n");
return;
}
print_isd_info(addr);
}
/* Init + command line */
static void help(void)
{
puts("MiSoC BIOS");
puts("Available commands:");
puts("mr - read address space");
puts("mw - write address space");
puts("mc - copy address space");
puts("crc - compute CRC32 of a part of the address space");
#ifdef __lm32__
puts("rcsr - read processor CSR");
puts("wcsr - write processor CSR");
#endif
#ifdef ETHMAC_BASE
puts("netboot - boot via TFTP");
#endif
puts("serialboot - boot via SFL");
#ifdef FLASH_BOOT_ADDRESS
puts("flashboot - boot from flash");
#endif
puts("revision - display revision");
}
static char *get_token(char **str)
{
char *c, *d;
c = (char *)strchr(*str, ' ');
if(c == NULL) {
d = *str;
*str = *str+strlen(*str);
return d;
}
*c = 0;
d = *str;
*str = c+1;
return d;
}
static void do_command(char *c)
{
char *token;
token = get_token(&c);
if(strcmp(token, "mr") == 0) mr(get_token(&c), get_token(&c));
else if(strcmp(token, "mw") == 0) mw(get_token(&c), get_token(&c), get_token(&c));
else if(strcmp(token, "mc") == 0) mc(get_token(&c), get_token(&c), get_token(&c));
else if(strcmp(token, "crc") == 0) crc(get_token(&c), get_token(&c));
else if(strcmp(token, "flushl2") == 0) flush_l2_cache();
#ifdef FLASH_BOOT_ADDRESS
else if(strcmp(token, "flashboot") == 0) flashboot();
#endif
else if(strcmp(token, "serialboot") == 0) serialboot();
#ifdef ETHMAC_BASE
else if(strcmp(token, "netboot") == 0) netboot();
#endif
else if(strcmp(token, "revision") == 0) printf("%08x\n", MSC_GIT_ID);
else if(strcmp(token, "help") == 0) help();
#ifdef __lm32__
else if(strcmp(token, "rcsr") == 0) rcsr(get_token(&c));
else if(strcmp(token, "wcsr") == 0) wcsr(get_token(&c), get_token(&c));
#endif
#ifdef DFII_BASE
else if(strcmp(token, "sdrrow") == 0) sdrrow(get_token(&c));
else if(strcmp(token, "sdrsw") == 0) sdrsw();
else if(strcmp(token, "sdrhw") == 0) sdrhw();
else if(strcmp(token, "sdrrdbuf") == 0) sdrrdbuf(-1);
else if(strcmp(token, "sdrrd") == 0) sdrrd(get_token(&c), get_token(&c));
else if(strcmp(token, "sdrrderr") == 0) sdrrderr(get_token(&c));
else if(strcmp(token, "sdrwr") == 0) sdrwr(get_token(&c));
#ifdef DDRPHY_BASE
else if(strcmp(token, "sdrwlon") == 0) sdrwlon();
else if(strcmp(token, "sdrwloff") == 0) sdrwloff();
else if(strcmp(token, "sdrlevel") == 0) sdrlevel();
#endif
else if(strcmp(token, "memtest") == 0) memtest();
else if(strcmp(token, "sdrinit") == 0) sdrinit();
#endif
else if(strcmp(token, "dfs") == 0) dfs(get_token(&c));
else if(strcmp(token, "") != 0)
printf("Command not found\n");
}
extern unsigned int _ftext, _edata;
static void crcbios(void)
{
unsigned int offset_bios;
unsigned int length;
unsigned int expected_crc;
unsigned int actual_crc;
/*
* _edata is located right after the end of the flat
* binary image. The CRC tool writes the 32-bit CRC here.
* We also use the address of _edata to know the length
* of our code.
*/
offset_bios = (unsigned int)&_ftext;
expected_crc = _edata;
length = (unsigned int)&_edata - offset_bios;
actual_crc = crc32((unsigned char *)offset_bios, length);
if(expected_crc == actual_crc)
printf("BIOS CRC passed (%08x)\n", actual_crc);
else {
printf("BIOS CRC failed (expected %08x, got %08x)\n", expected_crc, actual_crc);
printf("The system will continue, but expect problems.\n");
}
}
static void readstr(char *s, int size)
{
char c[2];
int ptr;
c[1] = 0;
ptr = 0;
while(1) {
c[0] = readchar();
switch(c[0]) {
case 0x7f:
case 0x08:
if(ptr > 0) {
ptr--;
putsnonl("\x08 \x08");
}
break;
case 0x07:
break;
case '\r':
case '\n':
s[ptr] = 0x00;
putsnonl("\n");
return;
default:
putsnonl(c);
s[ptr] = c[0];
ptr++;
break;
}
}
}
static int test_user_abort(void)
{
char c;
printf("Automatic boot in 2 seconds...\n");
printf("Q/ESC: abort boot\n");
printf("F7: boot from serial\n");
#ifdef ETHMAC_BASE
printf("F8: boot from network\n");
#endif
timer0_en_write(0);
timer0_reload_write(0);
timer0_load_write(identifier_frequency_read()*2);
timer0_en_write(1);
timer0_update_value_write(1);
while(timer0_value_read()) {
if(readchar_nonblock()) {
c = readchar();
if((c == 'Q')||(c == '\e')) {
puts("Aborted");
return 0;
}
if(c == 0x06) {
serialboot();
return 0;
}
#ifdef ETHMAC_BASE
if(c == 0x07) {
netboot();
return 0;
}
#endif
}
timer0_update_value_write(1);
}
return 1;
}
static void boot_sequence(void)
{
if(test_user_abort()) {
#ifdef FLASH_BOOT_ADDRESS
flashboot();
#endif
serialboot();
#ifdef ETHMAC_BASE
netboot();
#endif
printf("No boot medium found\n");
}
}
int main(int i, char **c)
{
char buffer[64];
int sdr_ok;
irq_setmask(0);
irq_setie(1);
uart_init();
puts("\nMiSoC BIOS http://m-labs.hk\n"
"(c) Copyright 2007-2014 Sebastien Bourdeauducq");
printf("Revision %08x built "__DATE__" "__TIME__"\n\n", MSC_GIT_ID);
crcbios();
id_print();
#ifdef ETHMAC_BASE
ethreset();
#endif
#ifdef DFII_BASE
sdr_ok = sdrinit();
#else
sdr_ok = 1;
#endif
if(sdr_ok)
boot_sequence();
else
printf("Memory initialization failed\n");
while(1) {
putsnonl("\e[1mBIOS>\e[0m ");
readstr(buffer, 64);
do_command(buffer);
}
return 0;
}
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