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bios/boot: simplify flashboot (remove specific linux boot). 

Storage in SPI Flash is generally limited and booting Linux from it is no longer very useful
since boot from SDCard is now supported. This is in the continuity of the SDCard/Ethernet
simplications to have an easier and more flexible boot scheme.
This commit is contained in:
Florent Kermarrec 2020-06-11 13:38:38 +02:00
parent 7b65a93ca5
commit 653edd17ca
1 changed files with 8 additions and 73 deletions
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81
litex/soc/software/bios/boot.c
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@ -392,16 +392,6 @@ void netboot(void)
#ifdef FLASH_BOOT_ADDRESS
/* On systems with external SDRAM we copy out of the SPI flash into the SDRAM
before running, as it is faster. If we have no SDRAM then we have to
execute directly out of the SPI flash. */
#ifdef MAIN_RAM_BASE
#define FIRMWARE_BASE_ADDRESS MAIN_RAM_BASE
#else
/* Firmware code starts after (a) length and (b) CRC -- both unsigned ints */
#define FIRMWARE_BASE_ADDRESS (FLASH_BOOT_ADDRESS + 2 * sizeof(unsigned int))
#endif
static unsigned int check_image_in_flash(unsigned int base_address)
{
uint32_t length;
@ -452,85 +442,30 @@ static int copy_image_from_flash_to_ram(unsigned int flash_address, unsigned int
}
#endif
#ifndef KERNEL_IMAGE_RAM_OFFSET
#define KERNEL_IMAGE_RAM_OFFSET 0x00000000
#endif
#ifndef ROOTFS_IMAGE_RAM_OFFSET
#define ROOTFS_IMAGE_RAM_OFFSET 0x00800000
#endif
#ifndef DEVICE_TREE_IMAGE_RAM_OFFSET
#define DEVICE_TREE_IMAGE_RAM_OFFSET 0x01000000
#endif
#ifndef EMULATOR_IMAGE_RAM_OFFSET
#define EMULATOR_IMAGE_RAM_OFFSET 0x01100000
#endif
#ifndef KERNEL_IMAGE_FLASH_OFFSET
#define KERNEL_IMAGE_FLASH_OFFSET 0x00000000 // 0MB
#endif
#ifndef ROOTFS_IMAGE_FLASH_OFFSET
#define ROOTFS_IMAGE_FLASH_OFFSET 0x00500000 // 5MB
#endif
#ifndef DEVICE_TREE_IMAGE_FLASH_OFFSET
#define DEVICE_TREE_IMAGE_FLASH_OFFSET 0x00D00000 // 13MB
#endif
#ifndef EMULATOR_IMAGE_FLASH_OFFSET
#define EMULATOR_IMAGE_FLASH_OFFSET 0x00E00000 // 14MB
#endif
void flashboot(void)
{
uint32_t length;
uint32_t result;
#if defined(MAIN_RAM_BASE) && defined(CONFIG_CPU_TYPE_VEXRISCV) && defined(CONFIG_CPU_VARIANT_LINUX)
printf("Loading Image from flash...\n");
result = copy_image_from_flash_to_ram(
(FLASH_BOOT_ADDRESS + KERNEL_IMAGE_FLASH_OFFSET),
(MAIN_RAM_BASE + KERNEL_IMAGE_RAM_OFFSET));
if(result) {
printf("Loading rootfs.cpio from flash...\n");
result &= copy_image_from_flash_to_ram(
(FLASH_BOOT_ADDRESS + ROOTFS_IMAGE_FLASH_OFFSET),
(MAIN_RAM_BASE + ROOTFS_IMAGE_RAM_OFFSET));
}
if(result) {
printf("Loading rv32.dtb from flash...\n");
result &= copy_image_from_flash_to_ram(
(FLASH_BOOT_ADDRESS + DEVICE_TREE_IMAGE_FLASH_OFFSET),
(MAIN_RAM_BASE + DEVICE_TREE_IMAGE_RAM_OFFSET));
}
if(result) {
printf("Loading emulator.bin from flash...\n");
result &= copy_image_from_flash_to_ram(
(FLASH_BOOT_ADDRESS + EMULATOR_IMAGE_FLASH_OFFSET),
(MAIN_RAM_BASE + EMULATOR_IMAGE_RAM_OFFSET));
}
if(result) {
boot(0, 0, 0, MAIN_RAM_BASE + EMULATOR_IMAGE_RAM_OFFSET);
return;
}
#endif
printf("Booting from flash...\n");
length = check_image_in_flash(FLASH_BOOT_ADDRESS);
if(!length)
return;
#ifdef MAIN_RAM_BASE
/* When Main RAM is available, copy the code from the Flash and execute it
from Main RAM since faster */
result = copy_image_from_flash_to_ram(FLASH_BOOT_ADDRESS, MAIN_RAM_BASE);
if(!result)
return;
boot(0, 0, 0, MAIN_RAM_BASE);
#else
/* When Main RAM is not available, execute the code directly from Flash (XIP).
The code starts after (a) length and (b) CRC -- both uint32_t */
boot(0, 0, 0, (FLASH_BOOT_ADDRESS + 2 * sizeof(uint32_t)));
#endif
boot(0, 0, 0, FIRMWARE_BASE_ADDRESS);
}
#endif
/*-----------------------------------------------------------------------*/