On Sat, Apr 10, 2021 at 01:03:55PM +0200, Ahmad Fatoum wrote: > iomem was so far unimplemented for EFI, because barebox didn't know what > to put there as the UEFI implementation does the heavy lifting. > > Add an initcall that uses the EFI get_memory_map entry point to > remedy this. > > Signed-off-by: Ahmad Fatoum <ahmad@xxxxxx> > --- > arch/x86/mach-efi/elf_x86_64_efi.lds.S | 3 + > common/efi/Makefile | 1 + > common/efi/efi-iomem.c | 175 +++++++++++++++++++++++++ > common/memory.c | 2 +- > include/efi.h | 9 ++ > 5 files changed, 189 insertions(+), 1 deletion(-) > create mode 100644 common/efi/efi-iomem.c Applied, thanks Sascha > > diff --git a/arch/x86/mach-efi/elf_x86_64_efi.lds.S b/arch/x86/mach-efi/elf_x86_64_efi.lds.S > index ed79118a3615..ab4a9e815c00 100644 > --- a/arch/x86/mach-efi/elf_x86_64_efi.lds.S > +++ b/arch/x86/mach-efi/elf_x86_64_efi.lds.S > @@ -42,6 +42,7 @@ SECTIONS > *(.got.plt) > *(.got) > *(.data*) > + __bss_start = .; > *(.sdata) > /* the EFI loader doesn't seem to like a .bss section, so we stick > * it all into .data: */ > @@ -51,7 +52,9 @@ SECTIONS > *(.bss) > *(COMMON) > *(.rel.local) > + __bss_stop = .; > } > + _edata = .; > > . = ALIGN(4096); > .dynamic : { *(.dynamic) } > diff --git a/common/efi/Makefile b/common/efi/Makefile > index ef19969f93d5..d746fabe2109 100644 > --- a/common/efi/Makefile > +++ b/common/efi/Makefile > @@ -1,3 +1,4 @@ > obj-y += efi.o > obj-y += efi-image.o > bbenv-y += env-efi > +obj-$(CONFIG_CMD_IOMEM) += efi-iomem.o > diff --git a/common/efi/efi-iomem.c b/common/efi/efi-iomem.c > new file mode 100644 > index 000000000000..e223c595c478 > --- /dev/null > +++ b/common/efi/efi-iomem.c > @@ -0,0 +1,175 @@ > +// SPDX-License-Identifier: GPL-2.0 > +// Copyright (c) 2019 Ahmad Fatoum, Pengutronix > + > +#define pr_fmt(fmt) "efi-iomem: " fmt > + > +#include <common.h> > +#include <init.h> > +#include <efi.h> > +#include <efi/efi.h> > +#include <memory.h> > +#include <linux/sizes.h> > + > +static int efi_parse_mmap(struct efi_memory_desc *desc) > +{ > + struct resource *res; > + u32 flags; > + const char *name; > + char *fullname; > + resource_size_t va_base, va_size; > + int ret = 0; > + > + va_size = desc->npages * SZ_4K; > + if (!va_size) > + return 0; > + > + /* XXX At least OVMF doesn't populate ->virt_start and leaves it at zero > + * for all mapping. Thus assume a 1:1 mapping and ignore virt_start > + */ > + va_base = desc->phys_start; > + > + switch (desc->type) { > + case EFI_RESERVED_TYPE: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "reserved"; > + flags = IORESOURCE_MEM | IORESOURCE_DISABLED; > + break; > + case EFI_LOADER_CODE: > + return barebox_add_memory_bank("loader code", va_base, va_size); > + case EFI_LOADER_DATA: > + return barebox_add_memory_bank("loader data", va_base, va_size); > + case EFI_BOOT_SERVICES_CODE: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "boot services code"; > + flags = IORESOURCE_MEM | IORESOURCE_READONLY; > + break; > + case EFI_BOOT_SERVICES_DATA: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "boot services data"; > + flags = IORESOURCE_MEM; > + break; > + case EFI_RUNTIME_SERVICES_CODE: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "runtime services code"; > + flags = IORESOURCE_MEM | IORESOURCE_READONLY; > + break; > + case EFI_RUNTIME_SERVICES_DATA: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "runtime services data"; > + flags = IORESOURCE_MEM; > + break; > + case EFI_CONVENTIONAL_MEMORY: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "conventional memory"; > + flags = IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_CACHEABLE; > + break; > + case EFI_UNUSABLE_MEMORY: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "unusable"; > + flags = IORESOURCE_MEM | IORESOURCE_DISABLED; > + break; > + case EFI_ACPI_RECLAIM_MEMORY: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "ACPI reclaim memory"; > + flags = IORESOURCE_MEM | IORESOURCE_READONLY; > + break; > + case EFI_ACPI_MEMORY_NVS: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "ACPI NVS memory"; > + flags = IORESOURCE_MEM | IORESOURCE_READONLY; > + break; > + case EFI_MEMORY_MAPPED_IO: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "MMIO"; > + flags = IORESOURCE_MEM; > + break; > + case EFI_MEMORY_MAPPED_IO_PORT_SPACE: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "MMIOPORT"; > + flags = IORESOURCE_IO; > + break; > + case EFI_PAL_CODE: > + if (!IS_ENABLED(DEBUG)) > + return 0; > + name = "PAL code"; > + flags = IORESOURCE_MEM | IORESOURCE_ROM_BIOS_COPY; > + break; > + default: > + if (!(desc->type & (1U << 31))) { > + pr_warn("illegal memory type = %u >= %u\n", > + desc->type, EFI_MAX_MEMORY_TYPE); > + return -EINVAL; > + } > + > + if (!IS_ENABLED(DEBUG)) > + return 0; > + > + name = "vendor reserved"; > + flags = IORESOURCE_MEM | IORESOURCE_ROM_BIOS_COPY; > + } > + > + fullname = xasprintf("%s@%llx", name, desc->phys_start); > + > + pr_debug("%s: (0x%llx+0x%llx)\n", fullname, va_base, va_size); > + > + res = request_iomem_region(fullname, va_base, va_base + va_size - 1); > + if (IS_ERR(res)) { > + ret = PTR_ERR(res); > + goto out; > + } > + > + res->flags |= flags; > + > +out: > + free(fullname); > + return ret; > +} > + > +static int efi_barebox_populate_mmap(void) > +{ > + void *desc; > + u8 *mmap_buf = NULL; > + efi_status_t efiret; > + size_t mmap_size; > + size_t mapkey; > + size_t descsz; > + u32 descver; > + int ret = 0; > + > + mmap_size = sizeof(struct efi_memory_desc); > + > + do { > + mmap_buf = xrealloc(mmap_buf, mmap_size); > + efiret = BS->get_memory_map(&mmap_size, mmap_buf, > + &mapkey, &descsz, &descver); > + } while (efiret == EFI_BUFFER_TOO_SMALL); > + > + if (EFI_ERROR(efiret)) { > + ret = -efi_errno(efiret); > + goto out; > + } > + > + if (descver != 1) { > + ret = -ENOSYS; > + goto out; > + } > + > + for (desc = mmap_buf; (u8 *)desc < &mmap_buf[mmap_size]; desc += descsz) > + efi_parse_mmap(desc); > + > +out: > + free(mmap_buf); > + return ret; > +} > +mem_initcall(efi_barebox_populate_mmap); > diff --git a/common/memory.c b/common/memory.c > index a56eaf949411..392522bfc3db 100644 > --- a/common/memory.c > +++ b/common/memory.c > @@ -53,7 +53,7 @@ void mem_malloc_init(void *start, void *end) > mem_malloc_initialized = 1; > } > > -#if !defined __SANDBOX__ && !defined CONFIG_EFI_BOOTUP > +#if !defined __SANDBOX__ > static int mem_malloc_resource(void) > { > /* > diff --git a/include/efi.h b/include/efi.h > index b9f3428dc550..439803c29437 100644 > --- a/include/efi.h > +++ b/include/efi.h > @@ -91,6 +91,15 @@ typedef struct { > * Memory map descriptor: > */ > > +struct efi_memory_desc { > + u32 type; /* enum efi_memory_type */ > + u32 _padding; > + efi_physical_addr_t phys_start; > + void *virt_start; > + u64 npages; > + u64 attrs; > +}; > + > /* Memory types: */ > enum efi_memory_type { > EFI_RESERVED_TYPE, > -- > 2.30.0 > > > _______________________________________________ > barebox mailing list > barebox@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox