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sunxi: Support SPL in both eGON and TOC0 images

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SPL uses the image header to detect the boot device and to find the
offset of the next U-Boot stage. Since this information is stored
differently in the eGON and TOC0 image headers, add code to find the
correct value based on the image type currently in use.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
This commit is contained in:
Samuel Holland 2022-03-18 00:00:44 -05:00 committed by Andre Przywara
parent e9e87ec47c
commit 44de13d945
3 changed files with 33 additions and 13 deletions
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3
arch/arm/include/asm/arch-sunxi/spl.h
View File

@ -28,8 +28,7 @@
#define SUNIV_BOOTED_FROM_SPI 0xffff4130
#define SUNIV_BOOTED_FROM_MMC1 0xffff4150
#define is_boot0_magic(addr) (memcmp((void *)(addr), BOOT0_MAGIC, 8) == 0)
uint32_t sunxi_get_boot_device(void);
uint32_t sunxi_get_spl_size(void);
#endif

39
arch/arm/mach-sunxi/board.c
View File

@ -213,8 +213,21 @@ static int suniv_get_boot_source(void)
return SUNXI_INVALID_BOOT_SOURCE;
}
static int sunxi_egon_valid(struct boot_file_head *egon_head)
{
return !memcmp(egon_head->magic, BOOT0_MAGIC, 8); /* eGON.BT0 */
}
static int sunxi_toc0_valid(struct toc0_main_info *toc0_info)
{
return !memcmp(toc0_info->name, TOC0_MAIN_INFO_NAME, 8); /* TOC0.GLH */
}
static int sunxi_get_boot_source(void)
{
struct boot_file_head *egon_head = (void *)SPL_ADDR;
struct toc0_main_info *toc0_info = (void *)SPL_ADDR;
/*
* On the ARMv5 SoCs, the SPL header in SRAM is overwritten by the
* exception vectors in U-Boot proper, so we won't find any
@ -226,13 +239,15 @@ static int sunxi_get_boot_source(void)
!IS_ENABLED(CONFIG_SPL_BUILD))
return SUNXI_BOOTED_FROM_MMC0;
if (!is_boot0_magic(SPL_ADDR + 4)) /* eGON.BT0 */
return SUNXI_INVALID_BOOT_SOURCE;
if (IS_ENABLED(CONFIG_MACH_SUNIV))
return suniv_get_boot_source();
else
return readb(SPL_ADDR + 0x28);
if (sunxi_egon_valid(egon_head))
return readb(&egon_head->boot_media);
if (sunxi_toc0_valid(toc0_info))
return readb(&toc0_info->platform[0]);
/* Not a valid image, so we must have been booted via FEL. */
return SUNXI_INVALID_BOOT_SOURCE;
}
/* The sunxi internal brom will try to loader external bootloader
@ -278,12 +293,18 @@ uint32_t sunxi_get_boot_device(void)
}
#ifdef CONFIG_SPL_BUILD
static u32 sunxi_get_spl_size(void)
uint32_t sunxi_get_spl_size(void)
{
if (!is_boot0_magic(SPL_ADDR + 4)) /* eGON.BT0 */
return 0;
struct boot_file_head *egon_head = (void *)SPL_ADDR;
struct toc0_main_info *toc0_info = (void *)SPL_ADDR;
return readl(SPL_ADDR + 0x10);
if (sunxi_egon_valid(egon_head))
return readl(&egon_head->length);
if (sunxi_toc0_valid(toc0_info))
return readl(&toc0_info->length);
/* Not a valid image, so use the default U-Boot offset. */
return 0;
}
/*

4
arch/arm/mach-sunxi/spl_spi_sunxi.c
View File

@ -337,9 +337,9 @@ static int spl_spi_load_image(struct spl_image_info *spl_image,
int ret = 0;
struct image_header *header;
header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
int load_offset = readl(SPL_ADDR + 0x10);
uint32_t load_offset = sunxi_get_spl_size();
load_offset = max(load_offset, CONFIG_SYS_SPI_U_BOOT_OFFS);
load_offset = max_t(uint32_t, load_offset, CONFIG_SYS_SPI_U_BOOT_OFFS);
spi0_init();