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Started parsing multiboot info

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This commit is contained in:
Braiden Vasco 2017-11-04 11:07:04 +00:00
parent 84746cb114
commit e0739042f1
4 changed files with 31 additions and 11 deletions
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14
arch/init.c
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@ -1,8 +1,9 @@
#include "console.h"
#include "multiboot.h"
#include <kernelmq/info.h> #include <kernelmq/info.h>
#include <kernelmq/stdlib.h> #include <kernelmq/stdlib.h>
#define MULTIBOOT_MAGIC 0x36d76289
// Defined in linker script // Defined in linker script
extern char _kernel_offset; extern char _kernel_offset;
extern char _kernel_phys_base; extern char _kernel_phys_base;
@ -16,13 +17,14 @@ const struct KernelMQ_Info *init(unsigned long multiboot_magic, unsigned long mu
return 0; return 0;
} }
// Unaligned address kmemset(&kinfo, 0, sizeof(struct KernelMQ_Info));
if (multiboot_info_addr & 7) {
console_initialize();
if (!multiboot_parse(&kinfo, multiboot_info_addr)) {
return 0; return 0;
} }
kmemset(&kinfo, 0, sizeof(struct KernelMQ_Info));
kinfo.kernel_offset = (unsigned long)&_kernel_offset; kinfo.kernel_offset = (unsigned long)&_kernel_offset;
kinfo.kernel_phys_base = (unsigned long)&_kernel_phys_base; kinfo.kernel_phys_base = (unsigned long)&_kernel_phys_base;

3
arch/main.c
View file

@ -1,4 +1,3 @@
#include "console.h"
#include "logger.h" #include "logger.h"
#include "protected.h" #include "protected.h"
#include "paging.h" #include "paging.h"
@ -15,8 +14,6 @@ void main(const struct KernelMQ_Info *const kinfo_ptr)
{ {
kmemset(&kinfo, 0, sizeof(struct KernelMQ_Info)); kmemset(&kinfo, 0, sizeof(struct KernelMQ_Info));
console_initialize();
if (!kinfo_ptr) { if (!kinfo_ptr) {
logger_fail("No kernel information. Halt."); logger_fail("No kernel information. Halt.");
return; return;

15
arch/multiboot.c
View file

@ -1,4 +1,4 @@
#include "kprintf.h" #include "multiboot.h"
#define MULTIBOOT_TAG_TYPE_END 0 #define MULTIBOOT_TAG_TYPE_END 0
#define MULTIBOOT_TAG_TYPE_CMDLINE 1 #define MULTIBOOT_TAG_TYPE_CMDLINE 1
@ -68,8 +68,17 @@ static void print_multiboot_tag_module (const struct multiboot_tag_module
static void print_multiboot_tag_basic_meminfo(const struct multiboot_tag_basic_meminfo *tag); static void print_multiboot_tag_basic_meminfo(const struct multiboot_tag_basic_meminfo *tag);
static void print_multiboot_tag_mmap (const struct multiboot_tag_mmap *tag); static void print_multiboot_tag_mmap (const struct multiboot_tag_mmap *tag);
void print_multiboot_info(unsigned long addr) unsigned char multiboot_parse(struct KernelMQ_Info *kinfo, unsigned long addr)
{ {
if (!kinfo) {
return 0;
}
// Unaligned address
if (addr & 7) {
return 0;
}
for ( for (
struct multiboot_tag *tag = (struct multiboot_tag*)(addr + 8); struct multiboot_tag *tag = (struct multiboot_tag*)(addr + 8);
tag->type != MULTIBOOT_TAG_TYPE_END; tag->type != MULTIBOOT_TAG_TYPE_END;
@ -77,6 +86,8 @@ void print_multiboot_info(unsigned long addr)
) { ) {
print_multiboot_tag(tag); print_multiboot_tag(tag);
} }
return 1;
} }
void print_multiboot_tag(const struct multiboot_tag *const tag) void print_multiboot_tag(const struct multiboot_tag *const tag)

10
arch/multiboot.h Normal file
View file

@ -0,0 +1,10 @@
#ifndef KERNELMQ_INCLUDED_MULTIBOOT
#define KERNELMQ_INCLUDED_MULTIBOOT 1
#include <kernelmq/info.h>
#define MULTIBOOT_MAGIC 0x36d76289
unsigned char multiboot_parse(struct KernelMQ_Info *kinfo, unsigned long addr);
#endif