[osboot] Refactor magenta loading code out of osboot
Change-Id: I3ca5d46ed0e864f712c1cc7c27999394222b72c5
diff --git a/Makefile b/Makefile
index 0117ae0..b48f3d7 100644
--- a/Makefile
+++ b/Makefile
@@ -41,6 +41,7 @@
$(call efi_app, showmem, src/showmem.c)
$(call efi_app, fileio, src/fileio.c)
OSBOOT_FILES := src/osboot.c \
+ src/magenta.c \
src/netboot.c \
src/netifc.c \
src/inet6.c
diff --git a/src/magenta.c b/src/magenta.c
new file mode 100644
index 0000000..2da2d2e
--- /dev/null
+++ b/src/magenta.c
@@ -0,0 +1,354 @@
+// Copyright 2016 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <magenta.h>
+
+#include <efilib.h>
+#include <stdio.h>
+#include <string.h>
+#include <utils.h>
+
+static EFI_GUID GraphicsOutputProtocol = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
+static EFI_GUID AcpiTableGUID = ACPI_TABLE_GUID;
+static EFI_GUID Acpi2TableGUID = ACPI_20_TABLE_GUID;
+static UINT8 ACPI_RSD_PTR[8] = "RSD PTR ";
+
+uint32_t find_acpi_root(EFI_HANDLE img, EFI_SYSTEM_TABLE* sys) {
+ EFI_CONFIGURATION_TABLE* cfgtab = sys->ConfigurationTable;
+ int i;
+
+ for (i = 0; i < sys->NumberOfTableEntries; i++) {
+ if (!CompareGuid(&cfgtab[i].VendorGuid, &AcpiTableGUID) &&
+ !CompareGuid(&cfgtab[i].VendorGuid, &Acpi2TableGUID)) {
+ // not an ACPI table
+ continue;
+ }
+ if (CompareMem(cfgtab[i].VendorTable, ACPI_RSD_PTR, 8)) {
+ // not the Root Description Pointer
+ continue;
+ }
+ return (uint64_t)cfgtab[i].VendorTable;
+ }
+ return 0;
+}
+
+#define E820_IGNORE 0
+#define E820_RAM 1
+#define E820_RESERVED 2
+#define E820_ACPI 3
+#define E820_NVS 4
+#define E820_UNUSABLE 5
+
+const char* e820name[] = {
+ "IGNORE",
+ "RAM",
+ "RESERVED",
+ "ACPI",
+ "NVS",
+ "UNUSABLE",
+};
+
+struct e820entry {
+ UINT64 addr;
+ UINT64 size;
+ UINT32 type;
+} __attribute__((packed));
+
+static unsigned e820type(unsigned uefi_mem_type) {
+ switch (uefi_mem_type) {
+ case EfiReservedMemoryType:
+ case EfiPalCode:
+ return E820_RESERVED;
+ case EfiRuntimeServicesCode:
+ case EfiRuntimeServicesData:
+#if WITH_RUNTIME_SERVICES
+ return E820_RESERVED;
+#else
+ return E820_RAM;
+#endif
+ case EfiACPIReclaimMemory:
+ return E820_ACPI;
+ case EfiACPIMemoryNVS:
+ return E820_NVS;
+ case EfiLoaderCode:
+ case EfiLoaderData:
+ case EfiBootServicesCode:
+ case EfiBootServicesData:
+ case EfiConventionalMemory:
+ return E820_RAM;
+ case EfiMemoryMappedIO:
+ case EfiMemoryMappedIOPortSpace:
+ return E820_IGNORE;
+ default:
+ if (uefi_mem_type >= 0x80000000) {
+ return E820_RAM;
+ }
+ return E820_UNUSABLE;
+ }
+}
+
+static unsigned char scratch[32768];
+static struct e820entry e820table[128];
+
+static int process_memory_map(EFI_SYSTEM_TABLE* sys, UINTN* _key, int silent) {
+ EFI_MEMORY_DESCRIPTOR* mmap;
+ struct e820entry* entry = e820table;
+ UINTN msize, off;
+ UINTN mkey, dsize;
+ UINT32 dversion;
+ unsigned n, type;
+ EFI_STATUS r;
+
+ msize = sizeof(scratch);
+ mmap = (EFI_MEMORY_DESCRIPTOR*)scratch;
+ mkey = dsize = dversion = 0;
+ r = sys->BootServices->GetMemoryMap(&msize, mmap, &mkey, &dsize, &dversion);
+ if (!silent)
+ printf("r=%lx msz=%lx key=%lx dsz=%lx dvn=%x\n", r, msize, mkey, dsize, dversion);
+ if (r != EFI_SUCCESS) {
+ return -1;
+ }
+ if (msize > sizeof(scratch)) {
+ if (!silent)
+ printf("Memory Table Too Large (%ld entries)\n", (msize / dsize));
+ return -1;
+ }
+ for (off = 0, n = 0; off < msize; off += dsize) {
+ mmap = (EFI_MEMORY_DESCRIPTOR*)(scratch + off);
+ type = e820type(mmap->Type);
+ if (type == E820_IGNORE) {
+ continue;
+ }
+ if ((n > 0) && (entry[n - 1].type == type)) {
+ if ((entry[n - 1].addr + entry[n - 1].size) == mmap->PhysicalStart) {
+ entry[n - 1].size += mmap->NumberOfPages * 4096UL;
+ continue;
+ }
+ }
+ entry[n].addr = mmap->PhysicalStart;
+ entry[n].size = mmap->NumberOfPages * 4096UL;
+ entry[n].type = type;
+ n++;
+ if (n == 128) {
+ if (!silent)
+ printf("E820 Table Too Large (%ld raw entries)\n", (msize / dsize));
+ return -1;
+ }
+ }
+ *_key = mkey;
+ return n;
+}
+
+#define ZP_E820_COUNT 0x1E8 // byte
+#define ZP_SETUP 0x1F1 // start of setup structure
+#define ZP_SETUP_SECTS 0x1F1 // byte (setup_size/512-1)
+#define ZP_JUMP 0x200 // jump instruction
+#define ZP_HEADER 0x202 // word "HdrS"
+#define ZP_VERSION 0x206 // half 0xHHLL
+#define ZP_LOADER_TYPE 0x210 // byte
+#define ZP_RAMDISK_BASE 0x218 // word (ptr or 0)
+#define ZP_RAMDISK_SIZE 0x21C // word (bytes)
+#define ZP_EXTRA_MAGIC 0x220 // word
+#define ZP_CMDLINE 0x228 // word (ptr)
+#define ZP_SYSSIZE 0x1F4 // word (size/16)
+#define ZP_XLOADFLAGS 0x236 // half
+#define ZP_E820_TABLE 0x2D0 // 128 entries
+
+#define ZP_ACPI_RSD 0x080 // word phys ptr
+#define ZP_FB_BASE 0x090
+#define ZP_FB_WIDTH 0x094
+#define ZP_FB_HEIGHT 0x098
+#define ZP_FB_STRIDE 0x09C
+#define ZP_FB_FORMAT 0x0A0
+#define ZP_FB_REGBASE 0x0A4
+#define ZP_FB_SIZE 0x0A8
+
+#define ZP_MAGIC_VALUE 0xDBC64323
+
+#define ZP8(p, off) (*((UINT8*)((p) + (off))))
+#define ZP16(p, off) (*((UINT16*)((p) + (off))))
+#define ZP32(p, off) (*((UINT32*)((p) + (off))))
+
+static void install_memmap(kernel_t* k, struct e820entry* memmap, unsigned count) {
+ memcpy(k->zeropage + ZP_E820_TABLE, memmap, sizeof(*memmap) * count);
+ ZP8(k->zeropage, ZP_E820_COUNT) = count;
+}
+
+static void start_kernel(kernel_t* k) {
+ // 64bit entry is at offset 0x200
+ UINT64 entry = (UINT64)(k->image + 0x200);
+
+ // ebx = 0, ebp = 0, edi = 0, esi = zeropage
+ __asm__ __volatile__(
+ "movl $0, %%ebp \n"
+ "cli \n"
+ "jmp *%[entry] \n" ::[entry] "a"(entry),
+ [zeropage] "S"(k->zeropage),
+ "b"(0), "D"(0));
+ for (;;)
+ ;
+}
+
+static int load_kernel(EFI_BOOT_SERVICES* bs, uint8_t* image, size_t sz, kernel_t* k) {
+ UINT32 setup_sz;
+ UINT32 image_sz;
+ UINT32 setup_end;
+ EFI_PHYSICAL_ADDRESS mem;
+
+ k->zeropage = NULL;
+ k->cmdline = NULL;
+ k->image = NULL;
+ k->pages = 0;
+
+ if (sz < 1024) {
+ // way too small to be a kernel
+ goto fail;
+ }
+
+ if (ZP32(image, ZP_HEADER) != 0x53726448) {
+ printf("kernel: invalid setup magic %08x\n", ZP32(image, ZP_HEADER));
+ goto fail;
+ }
+ if (ZP16(image, ZP_VERSION) < 0x020B) {
+ printf("kernel: unsupported setup version %04x\n", ZP16(image, ZP_VERSION));
+ goto fail;
+ }
+ setup_sz = (ZP8(image, ZP_SETUP_SECTS) + 1) * 512;
+ image_sz = (ZP32(image, ZP_SYSSIZE) * 16);
+ setup_end = ZP_JUMP + ZP8(image, ZP_JUMP + 1);
+
+ printf("setup %d image %d hdr %04x-%04x\n", setup_sz, image_sz, ZP_SETUP, setup_end);
+ // image size may be rounded up, thus +15
+ if ((setup_sz < 1024) || ((setup_sz + image_sz) > (sz + 15))) {
+ printf("kernel: invalid image size\n");
+ goto fail;
+ }
+
+ mem = 0xFF000;
+ if (bs->AllocatePages(AllocateMaxAddress, EfiLoaderData, 1, &mem)) {
+ printf("kernel: cannot allocate 'zero page'\n");
+ goto fail;
+ }
+ k->zeropage = (void*)mem;
+
+ mem = 0xFF000;
+ if (bs->AllocatePages(AllocateMaxAddress, EfiLoaderData, 1, &mem)) {
+ printf("kernel: cannot allocate commandline\n");
+ goto fail;
+ }
+ k->cmdline = (void*)mem;
+
+ mem = 0x100000;
+ k->pages = (image_sz + 4095) / 4096;
+ if (bs->AllocatePages(AllocateAddress, EfiLoaderData, k->pages + 1, &mem)) {
+ printf("kernel: cannot allocate kernel\n");
+ goto fail;
+ }
+ k->image = (void*)mem;
+
+ // setup zero page, copy setup header from kernel binary
+ ZeroMem(k->zeropage, 4096);
+ CopyMem(k->zeropage + ZP_SETUP, image + ZP_SETUP, setup_end - ZP_SETUP);
+
+ CopyMem(k->image, image + setup_sz, image_sz);
+
+ // empty commandline for now
+ ZP32(k->zeropage, ZP_CMDLINE) = (uint64_t)k->cmdline;
+ k->cmdline[0] = 0;
+
+ // default to no ramdisk
+ ZP32(k->zeropage, ZP_RAMDISK_BASE) = 0;
+ ZP32(k->zeropage, ZP_RAMDISK_SIZE) = 0;
+
+ // undefined bootloader
+ ZP8(k->zeropage, ZP_LOADER_TYPE) = 0xFF;
+
+ printf("kernel @%p, zeropage @%p, cmdline @%p\n",
+ k->image, k->zeropage, k->cmdline);
+
+ return 0;
+fail:
+ if (k->image) {
+ bs->FreePages((EFI_PHYSICAL_ADDRESS)k->image, k->pages);
+ }
+ if (k->cmdline) {
+ bs->FreePages((EFI_PHYSICAL_ADDRESS)k->cmdline, 1);
+ }
+ if (k->zeropage) {
+ bs->FreePages((EFI_PHYSICAL_ADDRESS)k->zeropage, 1);
+ }
+
+ return -1;
+}
+
+int boot_kernel(EFI_HANDLE img, EFI_SYSTEM_TABLE* sys,
+ void* image, size_t sz, void* ramdisk, size_t rsz,
+ void* cmdline, size_t csz) {
+ EFI_BOOT_SERVICES* bs = sys->BootServices;
+ kernel_t kernel;
+ EFI_STATUS r;
+ UINTN key;
+ int n, i;
+
+ EFI_GRAPHICS_OUTPUT_PROTOCOL* gop;
+ bs->LocateProtocol(&GraphicsOutputProtocol, NULL, (void**)&gop);
+
+ printf("boot_kernel() from %p (%ld bytes)\n", image, sz);
+ if (ramdisk && rsz) {
+ printf("ramdisk at %p (%ld bytes)\n", ramdisk, rsz);
+ }
+
+ if (load_kernel(sys->BootServices, image, sz, &kernel)) {
+ printf("Failed to load kernel image\n");
+ return -1;
+ }
+
+ ZP32(kernel.zeropage, ZP_EXTRA_MAGIC) = ZP_MAGIC_VALUE;
+ ZP32(kernel.zeropage, ZP_ACPI_RSD) = find_acpi_root(img, sys);
+
+ ZP32(kernel.zeropage, ZP_FB_BASE) = (UINT32)gop->Mode->FrameBufferBase;
+ ZP32(kernel.zeropage, ZP_FB_WIDTH) = (UINT32)gop->Mode->Info->HorizontalResolution;
+ ZP32(kernel.zeropage, ZP_FB_HEIGHT) = (UINT32)gop->Mode->Info->VerticalResolution;
+ ZP32(kernel.zeropage, ZP_FB_STRIDE) = (UINT32)gop->Mode->Info->PixelsPerScanLine;
+ ZP32(kernel.zeropage, ZP_FB_FORMAT) = 5; // XRGB32
+ ZP32(kernel.zeropage, ZP_FB_REGBASE) = 0;
+ ZP32(kernel.zeropage, ZP_FB_SIZE) = 256 * 1024 * 1024;
+
+ if (cmdline) {
+ // Truncate the cmdline to fit on a page
+ if (csz >= 4095) {
+ csz = 4095;
+ }
+ memcpy(kernel.cmdline, cmdline, csz);
+ kernel.cmdline[csz] = '\0';
+ }
+ if (ramdisk && rsz) {
+ ZP32(kernel.zeropage, ZP_RAMDISK_BASE) = (uint32_t) (uintptr_t) ramdisk;
+ ZP32(kernel.zeropage, ZP_RAMDISK_SIZE) = rsz;
+ }
+ n = process_memory_map(sys, &key, 0);
+
+ for (i = 0; i < n; i++) {
+ struct e820entry* e = e820table + i;
+ printf("%016lx %016lx %s\n", e->addr, e->size, e820name[e->type]);
+ }
+
+ r = sys->BootServices->ExitBootServices(img, key);
+ if (r == EFI_INVALID_PARAMETER) {
+ n = process_memory_map(sys, &key, 1);
+ r = sys->BootServices->ExitBootServices(img, key);
+ if (r) {
+ printf("Cannot ExitBootServices! (2) %s\n", efi_strerror(r));
+ return -1;
+ }
+ } else if (r) {
+ printf("Cannot ExitBootServices! (1) %s\n", efi_strerror(r));
+ return -1;
+ }
+
+ install_memmap(&kernel, e820table, n);
+ start_kernel(&kernel);
+
+ return 0;
+}
diff --git a/src/magenta.h b/src/magenta.h
new file mode 100644
index 0000000..3c2a1b9
--- /dev/null
+++ b/src/magenta.h
@@ -0,0 +1,16 @@
+// Copyright 2016 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <efi.h>
+
+typedef struct {
+ UINT8* zeropage;
+ UINT8* cmdline;
+ void* image;
+ UINT32 pages;
+} kernel_t;
+
+int boot_kernel(EFI_HANDLE img, EFI_SYSTEM_TABLE* sys,
+ void* image, size_t sz, void* ramdisk, size_t rsz,
+ void* cmdline, size_t csz);
diff --git a/src/osboot.c b/src/osboot.c
index 7639826..82e02e5 100644
--- a/src/osboot.c
+++ b/src/osboot.c
@@ -7,358 +7,11 @@
#include <stdio.h>
#include <string.h>
-#include <utils.h>
+#include <magenta.h>
#include <netboot.h>
-
-#define E820_IGNORE 0
-#define E820_RAM 1
-#define E820_RESERVED 2
-#define E820_ACPI 3
-#define E820_NVS 4
-#define E820_UNUSABLE 5
+#include <utils.h>
static EFI_GUID GraphicsOutputProtocol = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
-static EFI_GUID AcpiTableGUID = ACPI_TABLE_GUID;
-static EFI_GUID Acpi2TableGUID = ACPI_20_TABLE_GUID;
-
-static UINT8 ACPI_RSD_PTR[8] = "RSD PTR ";
-
-const char* e820name[] = {
- "IGNORE",
- "RAM",
- "RESERVED",
- "ACPI",
- "NVS",
- "UNUSABLE",
-};
-
-struct e820entry {
- UINT64 addr;
- UINT64 size;
- UINT32 type;
-} __attribute__((packed));
-
-unsigned e820type(unsigned uefi_mem_type) {
- switch (uefi_mem_type) {
- case EfiReservedMemoryType:
- case EfiPalCode:
- return E820_RESERVED;
- case EfiRuntimeServicesCode:
- case EfiRuntimeServicesData:
-#if WITH_RUNTIME_SERVICES
- return E820_RESERVED;
-#else
- return E820_RAM;
-#endif
- case EfiACPIReclaimMemory:
- return E820_ACPI;
- case EfiACPIMemoryNVS:
- return E820_NVS;
- case EfiLoaderCode:
- case EfiLoaderData:
- case EfiBootServicesCode:
- case EfiBootServicesData:
- case EfiConventionalMemory:
- return E820_RAM;
- case EfiMemoryMappedIO:
- case EfiMemoryMappedIOPortSpace:
- return E820_IGNORE;
- default:
- if (uefi_mem_type >= 0x80000000) {
- return E820_RAM;
- }
- return E820_UNUSABLE;
- }
-}
-
-static unsigned char scratch[32768];
-static struct e820entry e820table[128];
-
-int process_memory_map(EFI_SYSTEM_TABLE* sys, UINTN* _key, int silent) {
- EFI_MEMORY_DESCRIPTOR* mmap;
- struct e820entry* entry = e820table;
- UINTN msize, off;
- UINTN mkey, dsize;
- UINT32 dversion;
- unsigned n, type;
- EFI_STATUS r;
-
- msize = sizeof(scratch);
- mmap = (EFI_MEMORY_DESCRIPTOR*)scratch;
- mkey = dsize = dversion = 0;
- r = sys->BootServices->GetMemoryMap(&msize, mmap, &mkey, &dsize, &dversion);
- if (!silent)
- printf("r=%lx msz=%lx key=%lx dsz=%lx dvn=%x\n", r, msize, mkey, dsize, dversion);
- if (r != EFI_SUCCESS) {
- return -1;
- }
- if (msize > sizeof(scratch)) {
- if (!silent)
- printf("Memory Table Too Large (%ld entries)\n", (msize / dsize));
- return -1;
- }
- for (off = 0, n = 0; off < msize; off += dsize) {
- mmap = (EFI_MEMORY_DESCRIPTOR*)(scratch + off);
- type = e820type(mmap->Type);
- if (type == E820_IGNORE) {
- continue;
- }
- if ((n > 0) && (entry[n - 1].type == type)) {
- if ((entry[n - 1].addr + entry[n - 1].size) == mmap->PhysicalStart) {
- entry[n - 1].size += mmap->NumberOfPages * 4096UL;
- continue;
- }
- }
- entry[n].addr = mmap->PhysicalStart;
- entry[n].size = mmap->NumberOfPages * 4096UL;
- entry[n].type = type;
- n++;
- if (n == 128) {
- if (!silent)
- printf("E820 Table Too Large (%ld raw entries)\n", (msize / dsize));
- return -1;
- }
- }
- *_key = mkey;
- return n;
-}
-
-#define ZP_E820_COUNT 0x1E8 // byte
-#define ZP_SETUP 0x1F1 // start of setup structure
-#define ZP_SETUP_SECTS 0x1F1 // byte (setup_size/512-1)
-#define ZP_JUMP 0x200 // jump instruction
-#define ZP_HEADER 0x202 // word "HdrS"
-#define ZP_VERSION 0x206 // half 0xHHLL
-#define ZP_LOADER_TYPE 0x210 // byte
-#define ZP_RAMDISK_BASE 0x218 // word (ptr or 0)
-#define ZP_RAMDISK_SIZE 0x21C // word (bytes)
-#define ZP_EXTRA_MAGIC 0x220 // word
-#define ZP_CMDLINE 0x228 // word (ptr)
-#define ZP_SYSSIZE 0x1F4 // word (size/16)
-#define ZP_XLOADFLAGS 0x236 // half
-#define ZP_E820_TABLE 0x2D0 // 128 entries
-
-#define ZP_ACPI_RSD 0x080 // word phys ptr
-#define ZP_FB_BASE 0x090
-#define ZP_FB_WIDTH 0x094
-#define ZP_FB_HEIGHT 0x098
-#define ZP_FB_STRIDE 0x09C
-#define ZP_FB_FORMAT 0x0A0
-#define ZP_FB_REGBASE 0x0A4
-#define ZP_FB_SIZE 0x0A8
-
-#define ZP_MAGIC_VALUE 0xDBC64323
-
-#define ZP8(p, off) (*((UINT8*)((p) + (off))))
-#define ZP16(p, off) (*((UINT16*)((p) + (off))))
-#define ZP32(p, off) (*((UINT32*)((p) + (off))))
-
-typedef struct {
- UINT8* zeropage;
- UINT8* cmdline;
- void* image;
- UINT32 pages;
-} kernel_t;
-
-void install_memmap(kernel_t* k, struct e820entry* memmap, unsigned count) {
- memcpy(k->zeropage + ZP_E820_TABLE, memmap, sizeof(*memmap) * count);
- ZP8(k->zeropage, ZP_E820_COUNT) = count;
-}
-
-void start_kernel(kernel_t* k) {
- // 64bit entry is at offset 0x200
- UINT64 entry = (UINT64)(k->image + 0x200);
-
- // ebx = 0, ebp = 0, edi = 0, esi = zeropage
- __asm__ __volatile__(
- "movl $0, %%ebp \n"
- "cli \n"
- "jmp *%[entry] \n" ::[entry] "a"(entry),
- [zeropage] "S"(k->zeropage),
- "b"(0), "D"(0));
- for (;;)
- ;
-}
-
-int load_kernel(EFI_BOOT_SERVICES* bs, uint8_t* image, size_t sz, kernel_t* k) {
- UINT32 setup_sz;
- UINT32 image_sz;
- UINT32 setup_end;
- EFI_PHYSICAL_ADDRESS mem;
-
- k->zeropage = NULL;
- k->cmdline = NULL;
- k->image = NULL;
- k->pages = 0;
-
- if (sz < 1024) {
- // way too small to be a kernel
- goto fail;
- }
-
- if (ZP32(image, ZP_HEADER) != 0x53726448) {
- printf("kernel: invalid setup magic %08x\n", ZP32(image, ZP_HEADER));
- goto fail;
- }
- if (ZP16(image, ZP_VERSION) < 0x020B) {
- printf("kernel: unsupported setup version %04x\n", ZP16(image, ZP_VERSION));
- goto fail;
- }
- setup_sz = (ZP8(image, ZP_SETUP_SECTS) + 1) * 512;
- image_sz = (ZP32(image, ZP_SYSSIZE) * 16);
- setup_end = ZP_JUMP + ZP8(image, ZP_JUMP + 1);
-
- printf("setup %d image %d hdr %04x-%04x\n", setup_sz, image_sz, ZP_SETUP, setup_end);
- // image size may be rounded up, thus +15
- if ((setup_sz < 1024) || ((setup_sz + image_sz) > (sz + 15))) {
- printf("kernel: invalid image size\n");
- goto fail;
- }
-
- mem = 0xFF000;
- if (bs->AllocatePages(AllocateMaxAddress, EfiLoaderData, 1, &mem)) {
- printf("kernel: cannot allocate 'zero page'\n");
- goto fail;
- }
- k->zeropage = (void*)mem;
-
- mem = 0xFF000;
- if (bs->AllocatePages(AllocateMaxAddress, EfiLoaderData, 1, &mem)) {
- printf("kernel: cannot allocate commandline\n");
- goto fail;
- }
- k->cmdline = (void*)mem;
-
- mem = 0x100000;
- k->pages = (image_sz + 4095) / 4096;
- if (bs->AllocatePages(AllocateAddress, EfiLoaderData, k->pages + 1, &mem)) {
- printf("kernel: cannot allocate kernel\n");
- goto fail;
- }
- k->image = (void*)mem;
-
- // setup zero page, copy setup header from kernel binary
- ZeroMem(k->zeropage, 4096);
- CopyMem(k->zeropage + ZP_SETUP, image + ZP_SETUP, setup_end - ZP_SETUP);
-
- CopyMem(k->image, image + setup_sz, image_sz);
-
- // empty commandline for now
- ZP32(k->zeropage, ZP_CMDLINE) = (uint64_t)k->cmdline;
- k->cmdline[0] = 0;
-
- // default to no ramdisk
- ZP32(k->zeropage, ZP_RAMDISK_BASE) = 0;
- ZP32(k->zeropage, ZP_RAMDISK_SIZE) = 0;
-
- // undefined bootloader
- ZP8(k->zeropage, ZP_LOADER_TYPE) = 0xFF;
-
- printf("kernel @%p, zeropage @%p, cmdline @%p\n",
- k->image, k->zeropage, k->cmdline);
-
- return 0;
-fail:
- if (k->image) {
- bs->FreePages((EFI_PHYSICAL_ADDRESS)k->image, k->pages);
- }
- if (k->cmdline) {
- bs->FreePages((EFI_PHYSICAL_ADDRESS)k->cmdline, 1);
- }
- if (k->zeropage) {
- bs->FreePages((EFI_PHYSICAL_ADDRESS)k->zeropage, 1);
- }
-
- return -1;
-}
-
-uint32_t find_acpi_root(EFI_HANDLE img, EFI_SYSTEM_TABLE* sys) {
- EFI_CONFIGURATION_TABLE* cfgtab = sys->ConfigurationTable;
- int i;
-
- for (i = 0; i < sys->NumberOfTableEntries; i++) {
- if (!CompareGuid(&cfgtab[i].VendorGuid, &AcpiTableGUID) &&
- !CompareGuid(&cfgtab[i].VendorGuid, &Acpi2TableGUID)) {
- // not an ACPI table
- continue;
- }
- if (CompareMem(cfgtab[i].VendorTable, ACPI_RSD_PTR, 8)) {
- // not the Root Description Pointer
- continue;
- }
- return (uint64_t)cfgtab[i].VendorTable;
- }
- return 0;
-}
-
-static EFI_GRAPHICS_OUTPUT_PROTOCOL* gop;
-
-int boot_kernel(EFI_HANDLE img, EFI_SYSTEM_TABLE* sys,
- void* image, size_t sz, void* ramdisk, size_t rsz,
- void* cmdline, size_t csz) {
- kernel_t kernel;
- EFI_STATUS r;
- UINTN key;
- int n, i;
-
- printf("boot_kernel() from %p (%ld bytes)\n", image, sz);
- if (ramdisk && rsz) {
- printf("ramdisk at %p (%ld bytes)\n", ramdisk, rsz);
- }
-
- if (load_kernel(sys->BootServices, image, sz, &kernel)) {
- printf("Failed to load kernel image\n");
- return -1;
- }
-
- ZP32(kernel.zeropage, ZP_EXTRA_MAGIC) = ZP_MAGIC_VALUE;
- ZP32(kernel.zeropage, ZP_ACPI_RSD) = find_acpi_root(img, sys);
-
- ZP32(kernel.zeropage, ZP_FB_BASE) = (UINT32)gop->Mode->FrameBufferBase;
- ZP32(kernel.zeropage, ZP_FB_WIDTH) = (UINT32)gop->Mode->Info->HorizontalResolution;
- ZP32(kernel.zeropage, ZP_FB_HEIGHT) = (UINT32)gop->Mode->Info->VerticalResolution;
- ZP32(kernel.zeropage, ZP_FB_STRIDE) = (UINT32)gop->Mode->Info->PixelsPerScanLine;
- ZP32(kernel.zeropage, ZP_FB_FORMAT) = 5; // XRGB32
- ZP32(kernel.zeropage, ZP_FB_REGBASE) = 0;
- ZP32(kernel.zeropage, ZP_FB_SIZE) = 256 * 1024 * 1024;
-
- if (cmdline) {
- // Truncate the cmdline to fit on a page
- if (csz >= 4095) {
- csz = 4095;
- }
- memcpy(kernel.cmdline, cmdline, csz);
- kernel.cmdline[csz] = '\0';
- }
- if (ramdisk && rsz) {
- ZP32(kernel.zeropage, ZP_RAMDISK_BASE) = (uint32_t) (uintptr_t) ramdisk;
- ZP32(kernel.zeropage, ZP_RAMDISK_SIZE) = rsz;
- }
- n = process_memory_map(sys, &key, 0);
-
- for (i = 0; i < n; i++) {
- struct e820entry* e = e820table + i;
- printf("%016lx %016lx %s\n", e->addr, e->size, e820name[e->type]);
- }
-
- r = sys->BootServices->ExitBootServices(img, key);
- if (r == EFI_INVALID_PARAMETER) {
- n = process_memory_map(sys, &key, 1);
- r = sys->BootServices->ExitBootServices(img, key);
- if (r) {
- printf("Cannot ExitBootServices! (2) %s\n", efi_strerror(r));
- return -1;
- }
- } else if (r) {
- printf("Cannot ExitBootServices! (1) %s\n", efi_strerror(r));
- return -1;
- }
-
- install_memmap(&kernel, e820table, n);
- start_kernel(&kernel);
-
- return 0;
-}
#define KBUFSIZE (32*1024*1024)
#define RBUFSIZE (256*1024*1024)
@@ -481,7 +134,7 @@
return;
}
-void draw_logo(void) {
+void draw_logo(EFI_GRAPHICS_OUTPUT_PROTOCOL* gop) {
if (!gop) return;
const uint32_t h_res = gop->Mode->Info->HorizontalResolution;
@@ -600,8 +253,9 @@
InitializeLib(img, sys);
InitGoodies(img, sys);
+ EFI_GRAPHICS_OUTPUT_PROTOCOL* gop;
bs->LocateProtocol(&GraphicsOutputProtocol, NULL, (void**)&gop);
- draw_logo();
+ draw_logo(gop);
printf("\nOSBOOT v0.2\n\n");
printf("Framebuffer base is at %lx\n\n", gop->Mode->FrameBufferBase);
