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 jonas@kwiboo.se --- 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 7c12112799..2007064f0a 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 + CONFIG_SYS_SDRAM_BASE), - (unsigned long)(gd->ram_top)); + size_t ram_top = (unsigned long)(gd->ram_size + CONFIG_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;