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litedram: Improve sdram init boot messages

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Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2019-09-24 16:19:29 +10:00
parent 33de131384
commit 12e8b0952d
2 changed files with 39 additions and 46 deletions
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2
litedram/gen-src/sdram_init/Makefile
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@ -22,7 +22,7 @@ OBJCOPY = $(CROSS_COMPILE)objcopy
#### Flags
CPPFLAGS = -nostdinc
CPPFLAGS += -I$(SRC_DIR)/libc/include -I$(LXSRC_DIR) -I$(LXINC_DIR) -I$(GENINC_DIR) -I$(SRC_DIR)/include
CPPFLAGS += -I$(SRC_DIR)/libc/include -I$(LXSRC_DIR) -I$(LXINC_DIR) -I$(GENINC_DIR) -I$(SRC_DIR)/include -I$(SRC_DIR)/../../include
CPPFLAGS += -isystem $(shell $(CC) -print-file-name=include)
CFLAGS = -Os -g -Wall -std=c99 -m64 -mabi=elfv2 -msoft-float -mno-string -mno-multiple -mno-vsx -mno-altivec -mlittle-endian -fno-stack-protector -mstrict-align -ffreestanding -fdata-sections -ffunction-sections -fno-delete-null-pointer-checks
ASFLAGS = $(CPPFLAGS) $(CFLAGS)

83
litedram/gen-src/sdram_init/main.c
View File

@ -5,6 +5,10 @@
#include <stdarg.h>
#include <stdio.h>
#include <generated/git.h>
#include "microwatt_soc.h"
#include "io.h"
#include "sdram.h"
/*
@ -15,42 +19,6 @@ static uint64_t potato_uart_base;
#define PROC_FREQ 100000000
#define UART_FREQ 115200
#define UART_BASE 0xc0002000
#define SYSCON_BASE 0xc0000000
#define POTATO_CONSOLE_TX 0x00
#define POTATO_CONSOLE_RX 0x08
#define POTATO_CONSOLE_STATUS 0x10
#define POTATO_CONSOLE_STATUS_RX_EMPTY 0x01
#define POTATO_CONSOLE_STATUS_TX_EMPTY 0x02
#define POTATO_CONSOLE_STATUS_RX_FULL 0x04
#define POTATO_CONSOLE_STATUS_TX_FULL 0x08
#define POTATO_CONSOLE_CLOCK_DIV 0x18
#define POTATO_CONSOLE_IRQ_EN 0x20
static inline uint8_t readb(unsigned long addr)
{
__asm__ volatile("sync" : : : "memory");
return *((volatile uint8_t *)addr);
}
static inline uint64_t readq(unsigned long addr)
{
__asm__ volatile("sync" : : : "memory");
return *((volatile uint64_t *)addr);
}
static inline void writeb(uint8_t val, unsigned long addr)
{
__asm__ volatile("sync" : : : "memory");
*((volatile uint8_t *)addr) = val;
}
static inline void writeq(uint64_t val, unsigned long addr)
{
__asm__ volatile("sync" : : : "memory");
*((volatile uint64_t *)addr) = val;
}
static uint8_t potato_uart_reg_read(int offset)
{
@ -145,19 +113,44 @@ void flush_l2_cache(void) { }
void main(void)
{
unsigned long long ftr, val;
int i;
// Let things settle ... not sure why but UART not happy otherwise
/*
* Let things settle ... not sure why but the UART is
* not happy otherwise. The PLL might need to settle ?
*/
potato_uart_init();
for (i = 0; i < 10000; i++)
potato_uart_reg_read(POTATO_CONSOLE_STATUS);
printf("Welcome to Microwatt !\n");
printf(" SIG: %016llx\n", (unsigned long long)readq(SYSCON_BASE + 0x00));
printf(" INFO: %016llx\n", (unsigned long long)readq(SYSCON_BASE + 0x08));
printf(" BRAMINFO: %016llx\n", (unsigned long long)readq(SYSCON_BASE + 0x10));
printf(" DRAMINFO: %016llx\n", (unsigned long long)readq(SYSCON_BASE + 0x18));
printf(" CLKINFO: %016llx\n", (unsigned long long)readq(SYSCON_BASE + 0x20));
printf(" CTRL: %016llx\n", (unsigned long long)readq(SYSCON_BASE + 0x28));
sdrinit();
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 ");
printf("\n");
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_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();
}
printf("Booting from BRAM...\n");
}