diff options
Diffstat (limited to 'board/denx/m28evk')
-rw-r--r-- | board/denx/m28evk/Makefile | 7 | ||||
-rw-r--r-- | board/denx/m28evk/m28evk.c | 18 | ||||
-rw-r--r-- | board/denx/m28evk/mem_init.c | 27 |
3 files changed, 49 insertions, 3 deletions
diff --git a/board/denx/m28evk/Makefile b/board/denx/m28evk/Makefile index 47229e6ca9d..b6f002fe36f 100644 --- a/board/denx/m28evk/Makefile +++ b/board/denx/m28evk/Makefile @@ -30,7 +30,7 @@ COBJS := m28evk.o endif ifdef CONFIG_SPL_BUILD -COBJS := mem_init.o mmc_boot.o power_init.o +COBJS := mem_init.o mmc_boot.o power_init.o memsize.o endif SRCS := $(COBJS:.o=.c) @@ -41,6 +41,11 @@ $(LIB): $(obj).depend $(OBJS) all: $(ALL) +ifdef CONFIG_SPL_BUILD +memsize.c: + ln -sf $(TOPDIR)/common/memsize.c $@ +endif + ######################################################################### # defines $(obj).depend target diff --git a/board/denx/m28evk/m28evk.c b/board/denx/m28evk/m28evk.c index 118e2222a5d..168ceeb6a51 100644 --- a/board/denx/m28evk/m28evk.c +++ b/board/denx/m28evk/m28evk.c @@ -63,10 +63,24 @@ int board_init(void) return 0; } +#define HW_DIGCTRL_SCRATCH0 0x8001c280 +#define HW_DIGCTRL_SCRATCH1 0x8001c290 int dram_init(void) { - /* dram_init must store complete ramsize in gd->ram_size */ - gd->ram_size = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE); + uint32_t sz[2]; + + sz[0] = readl(HW_DIGCTRL_SCRATCH0); + sz[1] = readl(HW_DIGCTRL_SCRATCH1); + + if (sz[0] != sz[1]) { + printf("MX28:\n" + "Error, the RAM size in HW_DIGCTRL_SCRATCH0 and\n" + "HW_DIGCTRL_SCRATCH1 is not the same. Please\n" + "verify these two registers contain valid RAM size!\n"); + hang(); + } + + gd->ram_size = sz[0]; return 0; } diff --git a/board/denx/m28evk/mem_init.c b/board/denx/m28evk/mem_init.c index 066fe0d1a4d..17d1f9b6a16 100644 --- a/board/denx/m28evk/mem_init.c +++ b/board/denx/m28evk/mem_init.c @@ -165,6 +165,31 @@ void mx28_mem_setup_vddd(void) &power_regs->hw_power_vdddctrl); } +#define HW_DIGCTRL_SCRATCH0 0x8001c280 +#define HW_DIGCTRL_SCRATCH1 0x8001c290 +void data_abort_memdetect_handler(void) __attribute__((naked)); +void data_abort_memdetect_handler(void) +{ + asm volatile("subs pc, r14, #4"); +} + +void mx28_mem_get_size(void) +{ + uint32_t sz, da; + uint32_t *vt = (uint32_t *)0x20; + + /* Replace the DABT handler. */ + da = vt[4]; + vt[4] = (uint32_t)&data_abort_memdetect_handler; + + sz = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE); + writel(sz, HW_DIGCTRL_SCRATCH0); + writel(sz, HW_DIGCTRL_SCRATCH1); + + /* Restore the old DABT handler. */ + vt[4] = da; +} + void mx28_mem_init(void) { struct mx28_clkctrl_regs *clkctrl_regs = @@ -210,4 +235,6 @@ void mx28_mem_init(void) early_delay(10000); mx28_mem_setup_cpu_and_hbus(); + + mx28_mem_get_size(); } |