From 2ec15cabe973efd9a4f5324b48f566a03c8663d5 Mon Sep 17 00:00:00 2001 From: Jonas Karlman Date: Tue, 7 Feb 2023 17:27:11 +0000 Subject: [PATCH] rockchip: sdram: add dram bank with usable memory beyond 4GB Add a second dram bank of usable memory beyond the blob of space for peripheral near 4GB. Any memory that exists beyond the 4GB mark is added to the second bank. Signed-off-by: Jonas Karlman Reviewed-by: Kever Yang --- arch/arm/mach-rockchip/sdram.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-rockchip/sdram.c b/arch/arm/mach-rockchip/sdram.c index 91951e4..1d17a74 100644 --- a/arch/arm/mach-rockchip/sdram.c +++ b/arch/arm/mach-rockchip/sdram.c @@ -37,13 +37,19 @@ struct tos_parameter_t { int dram_init_banksize(void) { - size_t top = min((unsigned long)(gd->ram_size + CFG_SYS_SDRAM_BASE), - (unsigned long)(gd->ram_top)); + size_t ram_top = (unsigned long)(gd->ram_size + CFG_SYS_SDRAM_BASE); + size_t top = min((unsigned long)ram_top, (unsigned long)(gd->ram_top)); #ifdef CONFIG_ARM64 /* Reserve 0x200000 for ATF bl31 */ gd->bd->bi_dram[0].start = 0x200000; gd->bd->bi_dram[0].size = top - gd->bd->bi_dram[0].start; + + /* Add usable memory beyond the blob of space for peripheral near 4GB */ + if (ram_top > SZ_4G && top < SZ_4G) { + gd->bd->bi_dram[1].start = SZ_4G; + gd->bd->bi_dram[1].size = ram_top - gd->bd->bi_dram[1].start; + } #else #ifdef CONFIG_SPL_OPTEE_IMAGE struct tos_parameter_t *tos_parameter; @@ -181,7 +187,7 @@ size_t rockchip_sdram_size(phys_addr_t reg) * 2. update board_get_usable_ram_top() and dram_init_banksize() * to reserve memory for peripheral space after previous update. */ - if (size_mb > (SDRAM_MAX_SIZE >> 20)) + if (!IS_ENABLED(CONFIG_ARM64) && size_mb > (SDRAM_MAX_SIZE >> 20)) size_mb = (SDRAM_MAX_SIZE >> 20); return (size_t)size_mb << 20; -- 2.7.4