diff options
Diffstat (limited to 'arch/arm/mach-imx/imx8m/soc.c')
| -rw-r--r-- | arch/arm/mach-imx/imx8m/soc.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index be38ca52885..986687e9ce4 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -32,6 +32,7 @@ #include <imx_sip.h> #include <linux/bitops.h> #include <linux/bitfield.h> +#include <linux/sizes.h> DECLARE_GLOBAL_DATA_PTR; @@ -206,6 +207,14 @@ void enable_caches(void) int entry = imx8m_find_dram_entry_in_mem_map(); u64 attrs = imx8m_mem_map[entry].attrs; + /* Deactivate the data cache, possibly enabled in arch_cpu_init() */ + dcache_disable(); + /* + * Force the call of setup_all_pgtables() in mmu_setup() by clearing tlb_fillptr + * to update the TLB location udpated in board_f.c::reserve_mmu + */ + gd->arch.tlb_fillptr = 0; + while (i < CONFIG_NR_DRAM_BANKS && entry < ARRAY_SIZE(imx8m_mem_map)) { if (gd->bd->bi_dram[i].start == 0) @@ -587,12 +596,50 @@ static void imx8m_setup_csu_tzasc(void) } } +/* + * Place early TLB into the .data section so that it will not + * get cleared, use 16 kiB alignment. + */ +#define EARLY_TLB_SIZE SZ_64K +u8 early_tlb[EARLY_TLB_SIZE] __section(".data") __aligned(0x4000); + +/* + * Initialize the MMU and activate cache in U-Boot pre-reloc stage + * MMU/TLB is updated in enable_caches() for U-Boot after relocation + */ +static void early_enable_caches(void) +{ + phys_size_t sdram_size; + int entry, ret; + + if (IS_ENABLED(CONFIG_SPL_BUILD)) + return; + + if (CONFIG_IS_ENABLED(SYS_ICACHE_OFF) || CONFIG_IS_ENABLED(SYS_DCACHE_OFF)) + return; + + /* Use maximum available DRAM size in first bank. */ + ret = board_phys_sdram_size(&sdram_size); + if (ret) + return; + + entry = imx8m_find_dram_entry_in_mem_map(); + imx8m_mem_map[entry].size = max(sdram_size, (phys_size_t)0xc0000000); + + gd->arch.tlb_size = EARLY_TLB_SIZE; + gd->arch.tlb_addr = (unsigned long)&early_tlb; + + /* Enable MMU (default configuration) */ + dcache_enable(); +} + int arch_cpu_init(void) { struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; #if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF) icache_enable(); + early_enable_caches(); #endif /* @@ -735,6 +782,7 @@ int boot_mode_getprisec(void) #endif #if defined(CONFIG_IMX8MN) || defined(CONFIG_IMX8MP) +#ifdef SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION #define IMG_CNTN_SET1_OFFSET GENMASK(22, 19) unsigned long arch_spl_mmc_get_uboot_raw_sector(struct mmc *mmc, unsigned long raw_sect) @@ -769,6 +817,7 @@ unsigned long arch_spl_mmc_get_uboot_raw_sector(struct mmc *mmc, return raw_sect; } +#endif /* SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION */ #endif bool is_usb_boot(void) |