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imx: imx8ulp: reserve tee memory

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The TEE memory should be reserved when TEE is present, so need
to runtime update dram bank and memory information according to
tee present or not.

Signed-off-by: Ji Luo <ji.luo@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ji Luo 2022-04-06 14:30:28 +08:00 committed by Stefano Babic
parent 8c453e9d3d
commit 112b777849
1 changed files with 100 additions and 2 deletions
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102
arch/arm/mach-imx/imx8ulp/soc.c
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@ -413,6 +413,17 @@ static struct mm_region imx8ulp_arm64_mem_map[] = {
struct mm_region *mem_map = imx8ulp_arm64_mem_map;
static unsigned int imx8ulp_find_dram_entry_in_mem_map(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(imx8ulp_arm64_mem_map); i++)
if (imx8ulp_arm64_mem_map[i].phys == CONFIG_SYS_SDRAM_BASE)
return i;
hang(); /* Entry not found, this must never happen. */
}
/* simplify the page table size to enhance boot speed */
#define MAX_PTE_ENTRIES 512
#define MAX_MEM_MAP_REGIONS 16
@ -444,19 +455,106 @@ u64 get_page_table_size(void)
void enable_caches(void)
{
/* TODO: add TEE memmap region */
/* If OPTEE runs, remove OPTEE memory from MMU table to avoid speculative prefetch */
if (rom_pointer[1]) {
/*
* TEE are loaded, So the ddr bank structures
* have been modified update mmu table accordingly
*/
int i = 0;
int entry = imx8ulp_find_dram_entry_in_mem_map();
u64 attrs = imx8ulp_arm64_mem_map[entry].attrs;
while (i < CONFIG_NR_DRAM_BANKS &&
entry < ARRAY_SIZE(imx8ulp_arm64_mem_map)) {
if (gd->bd->bi_dram[i].start == 0)
break;
imx8ulp_arm64_mem_map[entry].phys = gd->bd->bi_dram[i].start;
imx8ulp_arm64_mem_map[entry].virt = gd->bd->bi_dram[i].start;
imx8ulp_arm64_mem_map[entry].size = gd->bd->bi_dram[i].size;
imx8ulp_arm64_mem_map[entry].attrs = attrs;
debug("Added memory mapping (%d): %llx %llx\n", entry,
imx8ulp_arm64_mem_map[entry].phys, imx8ulp_arm64_mem_map[entry].size);
i++; entry++;
}
}
icache_enable();
dcache_enable();
}
__weak int board_phys_sdram_size(phys_size_t *size)
{
if (!size)
return -EINVAL;
*size = PHYS_SDRAM_SIZE;
return 0;
}
int dram_init(void)
{
gd->ram_size = PHYS_SDRAM_SIZE;
unsigned int entry = imx8ulp_find_dram_entry_in_mem_map();
phys_size_t sdram_size;
int ret;
ret = board_phys_sdram_size(&sdram_size);
if (ret)
return ret;
/* rom_pointer[1] contains the size of TEE occupies */
if (rom_pointer[1])
gd->ram_size = sdram_size - rom_pointer[1];
else
gd->ram_size = sdram_size;
/* also update the SDRAM size in the mem_map used externally */
imx8ulp_arm64_mem_map[entry].size = sdram_size;
return 0;
}
int dram_init_banksize(void)
{
int bank = 0;
int ret;
phys_size_t sdram_size;
ret = board_phys_sdram_size(&sdram_size);
if (ret)
return ret;
gd->bd->bi_dram[bank].start = PHYS_SDRAM;
if (rom_pointer[1]) {
phys_addr_t optee_start = (phys_addr_t)rom_pointer[0];
phys_size_t optee_size = (size_t)rom_pointer[1];
gd->bd->bi_dram[bank].size = optee_start - gd->bd->bi_dram[bank].start;
if ((optee_start + optee_size) < (PHYS_SDRAM + sdram_size)) {
if (++bank >= CONFIG_NR_DRAM_BANKS) {
puts("CONFIG_NR_DRAM_BANKS is not enough\n");
return -1;
}
gd->bd->bi_dram[bank].start = optee_start + optee_size;
gd->bd->bi_dram[bank].size = PHYS_SDRAM +
sdram_size - gd->bd->bi_dram[bank].start;
}
} else {
gd->bd->bi_dram[bank].size = sdram_size;
}
return 0;
}
phys_size_t get_effective_memsize(void)
{
/* return the first bank as effective memory */
if (rom_pointer[1])
return ((phys_addr_t)rom_pointer[0] - PHYS_SDRAM);
return gd->ram_size;
}
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
void get_board_serial(struct tag_serialnr *serialnr)
{