diff options
Diffstat (limited to 'arch/arm/mach-rockchip')
| -rw-r--r-- | arch/arm/mach-rockchip/rk3036/sdram_rk3036.c | 4 | ||||
| -rw-r--r-- | arch/arm/mach-rockchip/sdram_common.c | 18 |
2 files changed, 20 insertions, 2 deletions
diff --git a/arch/arm/mach-rockchip/rk3036/sdram_rk3036.c b/arch/arm/mach-rockchip/rk3036/sdram_rk3036.c index 4e5690eae3..2012d9fe04 100644 --- a/arch/arm/mach-rockchip/rk3036/sdram_rk3036.c +++ b/arch/arm/mach-rockchip/rk3036/sdram_rk3036.c @@ -1,6 +1,6 @@ -// SPDX-License-Identifier: GPL-2.0+ +// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause /* - * (C) Copyright 2015 Google, Inc + * (C) Copyright 2015 Rockchip Electronics Co., Ltd */ #include <common.h> #include <asm/io.h> diff --git a/arch/arm/mach-rockchip/sdram_common.c b/arch/arm/mach-rockchip/sdram_common.c index 650d53e4d9..a27138083a 100644 --- a/arch/arm/mach-rockchip/sdram_common.c +++ b/arch/arm/mach-rockchip/sdram_common.c @@ -48,6 +48,24 @@ size_t rockchip_sdram_size(phys_addr_t reg) rank, col, bk, cs0_row, bw, row_3_4); } + /* + * This is workaround for issue we can't get correct size for 4GB ram + * in 32bit system and available before we really need ram space + * out of 4GB, eg.enable ARM LAPE(rk3288 supports 8GB ram). + * The size of 4GB is '0x1 00000000', and this value will be truncated + * to 0 in 32bit system, and system can not get correct ram size. + * Rockchip SoCs reserve a blob of space for peripheral near 4GB, + * and we are now setting SDRAM_MAX_SIZE as max available space for + * ram in 4GB, so we can use this directly to workaround the issue. + * TODO: + * 1. update correct value for SDRAM_MAX_SIZE as what dram + * controller sees. + * 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)) + size_mb = (SDRAM_MAX_SIZE >> 20); + return (size_t)size_mb << 20; } |