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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-12 20:39:07 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-12 20:39:07 (GMT) |
commit | 01e9d22638f387b5413163d1030169b6478c09c5 (patch) | |
tree | f36991611954663429f2ed36ec19145dd0c9ec4f /drivers/firmware/efi | |
parent | 541d284be0fcca3d3990e6dd89b091aec66849c6 (diff) | |
parent | 6660800fb7fd0f66faecb3c550fe59709220ade5 (diff) | |
download | linux-01e9d22638f387b5413163d1030169b6478c09c5.tar.xz |
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King:
- UEFI boot and runtime services support for ARM from Ard Biesheuvel
and Roy Franz.
- DT compatibility with old atags booting protocol for Nokia N900
devices from Ivaylo Dimitrov.
- PSCI firmware interface using new arm-smc calling convention from
Jens Wiklander.
- Runtime patching for udiv/sdiv instructions for ARMv7 CPUs that
support these instructions from Nicolas Pitre.
- L2x0 cache updates from Dirk B and Linus Walleij.
- Randconfig fixes from Arnd Bergmann.
- ARMv7M (nommu) updates from Ezequiel Garcia
* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (34 commits)
ARM: 8481/2: drivers: psci: replace psci firmware calls
ARM: 8480/2: arm64: add implementation for arm-smccc
ARM: 8479/2: add implementation for arm-smccc
ARM: 8478/2: arm/arm64: add arm-smccc
ARM: 8494/1: mm: Enable PXN when running non-LPAE kernel on LPAE processor
ARM: 8496/1: OMAP: RX51: save ATAGS data in the early boot stage
ARM: 8495/1: ATAGS: move save_atags() to arch/arm/include/asm/setup.h
ARM: 8452/3: PJ4: make coprocessor access sequences buildable in Thumb2 mode
ARM: 8482/1: l2x0: make it possible to disable outer sync from DT
ARM: 8488/1: Make IPI_CPU_BACKTRACE a "non-secure" SGI
ARM: 8487/1: Remove IPI_CALL_FUNC_SINGLE
ARM: 8485/1: cpuidle: remove cpu parameter from the cpuidle_ops suspend hook
ARM: 8484/1: Documentation: l2c2x0: Mention separate controllers explicitly
ARM: 8483/1: Documentation: l2c: Rename l2cc to l2c2x0
ARM: 8477/1: runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()
ARM: 8476/1: VDSO: use PTR_ERR_OR_ZERO for vma check
ARM: 8453/2: proc-v7.S: don't locate temporary stack space in .text section
ARM: add UEFI stub support
ARM: wire up UEFI init and runtime support
ARM: only consider memblocks with NOMAP cleared for linear mapping
...
Diffstat (limited to 'drivers/firmware/efi')
-rw-r--r-- | drivers/firmware/efi/Makefile | 1 | ||||
-rw-r--r-- | drivers/firmware/efi/libstub/Makefile | 9 | ||||
-rw-r--r-- | drivers/firmware/efi/libstub/arm-stub.c | 4 | ||||
-rw-r--r-- | drivers/firmware/efi/libstub/arm32-stub.c | 85 |
4 files changed, 98 insertions, 1 deletions
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile index f292917b..62e654f 100644 --- a/drivers/firmware/efi/Makefile +++ b/drivers/firmware/efi/Makefile @@ -20,4 +20,5 @@ obj-$(CONFIG_EFI_STUB) += libstub/ obj-$(CONFIG_EFI_FAKE_MEMMAP) += fake_mem.o arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o +obj-$(CONFIG_ARM) += $(arm-obj-y) obj-$(CONFIG_ARM64) += $(arm-obj-y) diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index c0ddd1b..9c12e18 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -34,6 +34,7 @@ $(obj)/lib-%.o: $(srctree)/lib/%.c FORCE lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o string.o \ $(patsubst %.c,lib-%.o,$(arm-deps)) +lib-$(CONFIG_ARM) += arm32-stub.o lib-$(CONFIG_ARM64) += arm64-stub.o CFLAGS_arm64-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET) @@ -67,3 +68,11 @@ quiet_cmd_stubcopy = STUBCPY $@ $(OBJDUMP) -r $@ | grep $(STUBCOPY_RELOC-y) \ && (echo >&2 "$@: absolute symbol references not allowed in the EFI stub"; \ rm -f $@; /bin/false); else /bin/false; fi + +# +# ARM discards the .data section because it disallows r/w data in the +# decompressor. So move our .data to .data.efistub, which is preserved +# explicitly by the decompressor linker script. +# +STUBCOPY_FLAGS-$(CONFIG_ARM) += --rename-section .data=.data.efistub +STUBCOPY_RELOC-$(CONFIG_ARM) := R_ARM_ABS diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c index 950c87f..3397902 100644 --- a/drivers/firmware/efi/libstub/arm-stub.c +++ b/drivers/firmware/efi/libstub/arm-stub.c @@ -303,8 +303,10 @@ fail: * The value chosen is the largest non-zero power of 2 suitable for this purpose * both on 32-bit and 64-bit ARM CPUs, to maximize the likelihood that it can * be mapped efficiently. + * Since 32-bit ARM could potentially execute with a 1G/3G user/kernel split, + * map everything below 1 GB. */ -#define EFI_RT_VIRTUAL_BASE 0x40000000 +#define EFI_RT_VIRTUAL_BASE SZ_512M static int cmp_mem_desc(const void *l, const void *r) { diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c new file mode 100644 index 0000000..495ebd6 --- /dev/null +++ b/drivers/firmware/efi/libstub/arm32-stub.c @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2013 Linaro Ltd; <roy.franz@linaro.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include <linux/efi.h> +#include <asm/efi.h> + +efi_status_t handle_kernel_image(efi_system_table_t *sys_table, + unsigned long *image_addr, + unsigned long *image_size, + unsigned long *reserve_addr, + unsigned long *reserve_size, + unsigned long dram_base, + efi_loaded_image_t *image) +{ + unsigned long nr_pages; + efi_status_t status; + /* Use alloc_addr to tranlsate between types */ + efi_physical_addr_t alloc_addr; + + /* + * Verify that the DRAM base address is compatible with the ARM + * boot protocol, which determines the base of DRAM by masking + * off the low 27 bits of the address at which the zImage is + * loaded. These assumptions are made by the decompressor, + * before any memory map is available. + */ + dram_base = round_up(dram_base, SZ_128M); + + /* + * Reserve memory for the uncompressed kernel image. This is + * all that prevents any future allocations from conflicting + * with the kernel. Since we can't tell from the compressed + * image how much DRAM the kernel actually uses (due to BSS + * size uncertainty) we allocate the maximum possible size. + * Do this very early, as prints can cause memory allocations + * that may conflict with this. + */ + alloc_addr = dram_base; + *reserve_size = MAX_UNCOMP_KERNEL_SIZE; + nr_pages = round_up(*reserve_size, EFI_PAGE_SIZE) / EFI_PAGE_SIZE; + status = sys_table->boottime->allocate_pages(EFI_ALLOCATE_ADDRESS, + EFI_LOADER_DATA, + nr_pages, &alloc_addr); + if (status != EFI_SUCCESS) { + *reserve_size = 0; + pr_efi_err(sys_table, "Unable to allocate memory for uncompressed kernel.\n"); + return status; + } + *reserve_addr = alloc_addr; + + /* + * Relocate the zImage, so that it appears in the lowest 128 MB + * memory window. + */ + *image_size = image->image_size; + status = efi_relocate_kernel(sys_table, image_addr, *image_size, + *image_size, + dram_base + MAX_UNCOMP_KERNEL_SIZE, 0); + if (status != EFI_SUCCESS) { + pr_efi_err(sys_table, "Failed to relocate kernel.\n"); + efi_free(sys_table, *reserve_size, *reserve_addr); + *reserve_size = 0; + return status; + } + + /* + * Check to see if we were able to allocate memory low enough + * in memory. The kernel determines the base of DRAM from the + * address at which the zImage is loaded. + */ + if (*image_addr + *image_size > dram_base + ZIMAGE_OFFSET_LIMIT) { + pr_efi_err(sys_table, "Failed to relocate kernel, no low memory available.\n"); + efi_free(sys_table, *reserve_size, *reserve_addr); + *reserve_size = 0; + efi_free(sys_table, *image_size, *image_addr); + *image_size = 0; + return EFI_LOAD_ERROR; + } + return EFI_SUCCESS; +} |