boot: Add EFISTUB and refactor boot protocols

include/zinnia/alloc.h

@@ -2,6 +2,7 @@
 
 #pragma once
 
+#include <zinnia/boot.h>
 #include <zinnia/errno.h>
 #include <zinnia/initgraph.h>
 #include <zinnia/types.h>
@@ -14,19 +15,6 @@ enum alloc_flags {
     ALLOC_MEM20 = 1 << 2,  // Allocated memory needs to fit inside 20 bits.
 };
 
-enum phys_mem_usage {
-    PHYS_RESERVED,
-    PHYS_USABLE,
-    PHYS_STATIC,
-    PHYS_RECLAIMABLE,
-};
-
-struct phys_mem {
-    phys_t address;
-    size_t length;
-    enum phys_mem_usage usage;
-};
-
 // Base address of the HHDM.
 extern uintptr_t mem_hhdm_base;
 

include/zinnia/boot.h

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: ISC
+
+#pragma once
+
+#include <bits/types.h>
+#include <stddef.h>
+#include <stdint.h>
+
+enum phys_mem_usage {
+    PHYS_RESERVED,
+    PHYS_USABLE,
+    PHYS_STATIC,
+    PHYS_RECLAIMABLE,
+};
+
+struct phys_mem {
+    phys_t address;
+    size_t length;
+    enum phys_mem_usage usage;
+};
+
+constexpr size_t BOOT_PATH_MAX = 128;
+
+struct boot_file {
+    phys_t data;
+    size_t length;
+    char path[BOOT_PATH_MAX];
+};
+
+struct boot_color {
+    uint8_t shift, size;
+};
+
+struct boot_framebuffer {
+    phys_t base;
+    size_t width, height, pitch;
+    uint8_t bytes_per_pixel;
+    struct boot_color red, green, blue;
+};
+
+constexpr size_t BOOT_LOADER_NAME_MAX = 64;
+constexpr size_t BOOT_CMDLINE_MAX = 4096;
+constexpr size_t BOOT_MEM_MAP_MAX = 128;
+constexpr size_t BOOT_FILES_MAX = 8;
+
+struct boot_info {
+    char loader[BOOT_LOADER_NAME_MAX];
+    char cmdline[BOOT_CMDLINE_MAX];
+    struct phys_mem mem_map[BOOT_MEM_MAP_MAX];
+    size_t num_mem_maps;
+    phys_t phys_base;
+    uintptr_t virt_base;
+    uintptr_t hhdm_base;
+    struct boot_file files[BOOT_FILES_MAX];
+    size_t num_files;
+    struct boot_framebuffer fb;
+    phys_t dtb;
+    size_t dtb_size;
+    phys_t rsdp;
+};

include/zinnia/elf.h

@@ -2,8 +2,6 @@
 
 #pragma once
 
-#include <zinnia/errno.h>
-#include <zinnia/vfs.h>
 #include <arch/elf.h>
 #include <stdint.h>
 
@@ -84,6 +82,7 @@ enum : uint32_t {
     PT_MOD_CMDLINE = 0x60000005,
     PT_MOD_EXIT = 0x60000006,
     PT_MOD_MATCH = 0x60000007,
+    PT_BOOT_INFO = 0x60000008,
 };
 
 enum : uint16_t {

include/zinnia/init.h

@@ -2,6 +2,7 @@
 
 #pragma once
 
+#include <zinnia/boot.h>
 #include <zinnia/compiler.h>
 #include <zinnia/types.h>
 #include <zinnia/utils.h>
@@ -13,40 +14,7 @@
 #define __initdata              __used, __section(".init.data")
 #define __initdata_sorted(name) __used, __section(".init.data." name)
 
-struct boot_file {
-    phys_t data;
-    size_t length;
-    char path[128];
-};
-
-struct boot_color {
-    uint8_t shift, size;
-};
-
-struct boot_framebuffer {
-    phys_t base;
-    size_t width, height, pitch;
-    uint8_t bytes_per_pixel;
-    struct boot_color red, green, blue;
-};
-
-struct boot_info {
-    char* cmdline;
-    struct phys_mem* mem_map;
-    size_t num_mem_maps;
-    phys_t phys_base;
-    uintptr_t virt_base;
-    uintptr_t hhdm_base;
-    struct boot_file* files;
-    size_t num_files;
-    struct boot_framebuffer fb;
-    struct boot_file kernel_file;
-    phys_t dtb;
-    size_t dtb_size;
-#if CONFIG_ACPI
-    phys_t rsdp;
-#endif
-};
+extern struct boot_info boot_info;
 
 [[__visibility("hidden")]]
 extern uint8_t __ld_stack_top[];