diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/arch-meson/gxbb.h | 17 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-meson/mem.h | 16 | ||||
| -rw-r--r-- | arch/arm/mach-meson/board.c | 74 |
3 files changed, 99 insertions, 8 deletions
diff --git a/arch/arm/include/asm/arch-meson/gxbb.h b/arch/arm/include/asm/arch-meson/gxbb.h index 95a6fe6..ef63dea 100644 --- a/arch/arm/include/asm/arch-meson/gxbb.h +++ b/arch/arm/include/asm/arch-meson/gxbb.h @@ -7,10 +7,27 @@ #ifndef __GXBB_H__ #define __GXBB_H__ +#define GXBB_FIRMWARE_MEM_SIZE 0x1000000 + +#define GXBB_AOBUS_BASE 0xc8100000 #define GXBB_PERIPHS_BASE 0xc8834400 #define GXBB_HIU_BASE 0xc883c000 #define GXBB_ETH_BASE 0xc9410000 +/* Always-On Peripherals registers */ +#define GXBB_AO_ADDR(off) (GXBB_AOBUS_BASE + ((off) << 2)) + +#define GXBB_AO_SEC_GP_CFG0 GXBB_AO_ADDR(0x90) +#define GXBB_AO_SEC_GP_CFG3 GXBB_AO_ADDR(0x93) +#define GXBB_AO_SEC_GP_CFG4 GXBB_AO_ADDR(0x94) +#define GXBB_AO_SEC_GP_CFG5 GXBB_AO_ADDR(0x95) + +#define GXBB_AO_MEM_SIZE_MASK 0xFFFF0000 +#define GXBB_AO_MEM_SIZE_SHIFT 16 +#define GXBB_AO_BL31_RSVMEM_SIZE_MASK 0xFFFF0000 +#define GXBB_AO_BL31_RSVMEM_SIZE_SHIFT 16 +#define GXBB_AO_BL32_RSVMEM_SIZE_MASK 0xFFFF + /* Peripherals registers */ #define GXBB_PERIPHS_ADDR(off) (GXBB_PERIPHS_BASE + ((off) << 2)) diff --git a/arch/arm/include/asm/arch-meson/mem.h b/arch/arm/include/asm/arch-meson/mem.h new file mode 100644 index 0000000..86a8417 --- /dev/null +++ b/arch/arm/include/asm/arch-meson/mem.h @@ -0,0 +1,16 @@ +/* + * Copyright (C) 2016 BayLibre, SAS + * Author: Neil Armstrong <narmstrong@baylibre.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __MESON_MEM_H__ +#define __MESON_MEM_H__ + +/* Configure the reserved memory zones exported by the secure registers + * into EFI and DTB reserved memory entries. + */ +void meson_gx_init_reserved_memory(void *fdt); + +#endif /* __MESON_MEM_H__ */ diff --git a/arch/arm/mach-meson/board.c b/arch/arm/mach-meson/board.c index e89c6aa..908a0ca 100644 --- a/arch/arm/mach-meson/board.c +++ b/arch/arm/mach-meson/board.c @@ -11,6 +11,9 @@ #include <asm/arch/sm.h> #include <asm/armv8/mmu.h> #include <asm/unaligned.h> +#include <linux/sizes.h> +#include <efi_loader.h> +#include <asm/io.h> DECLARE_GLOBAL_DATA_PTR; @@ -34,15 +37,70 @@ int dram_init(void) return 0; } -int dram_init_banksize(void) +phys_size_t get_effective_memsize(void) { - /* Reserve first 16 MiB of RAM for firmware */ - gd->bd->bi_dram[0].start = 0x1000000; - gd->bd->bi_dram[0].size = 0xf000000; - /* Reserve 2 MiB for ARM Trusted Firmware (BL31) */ - gd->bd->bi_dram[1].start = 0x10000000; - gd->bd->bi_dram[1].size = gd->ram_size - 0x10200000; - return 0; + /* Size is reported in MiB, convert it in bytes */ + return ((readl(GXBB_AO_SEC_GP_CFG0) & GXBB_AO_MEM_SIZE_MASK) + >> GXBB_AO_MEM_SIZE_SHIFT) * SZ_1M; +} + +static void meson_board_add_reserved_memory(void *fdt, u64 start, u64 size) +{ + int ret; + + ret = fdt_add_mem_rsv(fdt, start, size); + if (ret) + printf("Could not reserve zone @ 0x%llx\n", start); + + if (IS_ENABLED(CONFIG_EFI_LOADER)) { + efi_add_memory_map(start, + ALIGN(size, EFI_PAGE_SIZE) >> EFI_PAGE_SHIFT, + EFI_RESERVED_MEMORY_TYPE, false); + } +} + +void meson_gx_init_reserved_memory(void *fdt) +{ + u64 bl31_size, bl31_start; + u64 bl32_size, bl32_start; + u32 reg; + + /* + * Get ARM Trusted Firmware reserved memory zones in : + * - AO_SEC_GP_CFG3: bl32 & bl31 size in KiB, can be 0 + * - AO_SEC_GP_CFG5: bl31 physical start address, can be NULL + * - AO_SEC_GP_CFG4: bl32 physical start address, can be NULL + */ + + reg = readl(GXBB_AO_SEC_GP_CFG3); + + bl31_size = ((reg & GXBB_AO_BL31_RSVMEM_SIZE_MASK) + >> GXBB_AO_BL31_RSVMEM_SIZE_SHIFT) * SZ_1K; + bl32_size = (reg & GXBB_AO_BL32_RSVMEM_SIZE_MASK) * SZ_1K; + + bl31_start = readl(GXBB_AO_SEC_GP_CFG5); + bl32_start = readl(GXBB_AO_SEC_GP_CFG4); + + /* + * Early Meson GXBB Firmware revisions did not provide the reserved + * memory zones in the registers, keep fixed memory zone handling. + */ + if (IS_ENABLED(CONFIG_MESON_GXBB) && + !reg && !bl31_start && !bl32_start) { + bl31_start = 0x10000000; + bl31_size = 0x200000; + } + + /* Add first 16MiB reserved zone */ + meson_board_add_reserved_memory(fdt, 0, GXBB_FIRMWARE_MEM_SIZE); + + /* Add BL31 reserved zone */ + if (bl31_start && bl31_size) + meson_board_add_reserved_memory(fdt, bl31_start, bl31_size); + + /* Add BL32 reserved zone */ + if (bl32_start && bl32_size) + meson_board_add_reserved_memory(fdt, bl32_start, bl32_size); } void reset_cpu(ulong addr) |