forked from cores/microwatt
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
|
|
#include <generated/git.h>
|
|
|
|
#include "microwatt_soc.h"
|
|
#include "io.h"
|
|
#include "sdram.h"
|
|
#include "console.h"
|
|
|
|
int _printf(const char *fmt, ...)
|
|
{
|
|
int count;
|
|
char buffer[320];
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
count = vsnprintf(buffer, sizeof(buffer), fmt, ap);
|
|
va_end(ap);
|
|
puts(buffer);
|
|
return count;
|
|
}
|
|
|
|
void flush_cpu_dcache(void)
|
|
{
|
|
}
|
|
|
|
void flush_cpu_icache(void)
|
|
{
|
|
__asm__ volatile ("icbi 0,0; isync" : : : "memory");
|
|
}
|
|
|
|
void main(void)
|
|
{
|
|
unsigned long long ftr, val;
|
|
|
|
/* Init the UART */
|
|
potato_uart_init();
|
|
|
|
printf("\n\nWelcome to Microwatt !\n\n");
|
|
|
|
/* TODO: Add core version information somewhere in syscon, possibly
|
|
* extracted from git
|
|
*/
|
|
printf(" Soc signature: %016llx\n",
|
|
(unsigned long long)readq(SYSCON_BASE + SYS_REG_SIGNATURE));
|
|
printf(" Soc features: ");
|
|
ftr = readq(SYSCON_BASE + SYS_REG_INFO);
|
|
if (ftr & SYS_REG_INFO_HAS_UART)
|
|
printf("UART ");
|
|
if (ftr & SYS_REG_INFO_HAS_DRAM)
|
|
printf("DRAM ");
|
|
if (ftr & SYS_REG_INFO_HAS_BRAM)
|
|
printf("BRAM ");
|
|
printf("\n");
|
|
if (ftr & SYS_REG_INFO_HAS_BRAM) {
|
|
val = readq(SYSCON_BASE + SYS_REG_BRAMINFO);
|
|
printf(" BRAM: %lld KB\n", val / 1024);
|
|
}
|
|
if (ftr & SYS_REG_INFO_HAS_DRAM) {
|
|
val = readq(SYSCON_BASE + SYS_REG_DRAMINFO);
|
|
printf(" DRAM: %lld MB\n", val / (1024 * 1024));
|
|
val = readq(SYSCON_BASE + SYS_REG_DRAMINITINFO);
|
|
printf(" DRAM INIT: %lld KB\n", val / 1024);
|
|
}
|
|
val = readq(SYSCON_BASE + SYS_REG_CLKINFO);
|
|
printf(" CLK: %lld MHz\n", val / 1000000);
|
|
|
|
printf("\n");
|
|
if (ftr & SYS_REG_INFO_HAS_DRAM) {
|
|
printf("LiteDRAM built from Migen %s and LiteX %s\n",
|
|
MIGEN_GIT_SHA1, LITEX_GIT_SHA1);
|
|
sdrinit();
|
|
}
|
|
if (ftr & SYS_REG_INFO_HAS_BRAM)
|
|
printf("Booting from BRAM...\n");
|
|
else {
|
|
void *s = (void *)(DRAM_INIT_BASE + 0x4000);
|
|
void *d = (void *)DRAM_BASE;
|
|
int sz = (0x10000 - 0x4000);
|
|
printf("Copying payload to DRAM...\n");
|
|
memcpy(d, s, sz);
|
|
printf("Booting from DRAM...\n");
|
|
flush_cpu_icache();
|
|
}
|
|
}
|