wip: change the C function set_mem_size to asm
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5fccbf3708
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@ -23,7 +23,7 @@ extern uint32_t _kernel_end;
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extern uint32_t boot_page_directory;
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extern uint32_t boot_page_directory;
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extern uint32_t *page_directory;
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extern uint32_t *page_directory;
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extern uint32_t page_table_default[1024];
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extern uint32_t page_table_default[1024];
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extern uint32_t mem_size;
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extern uint64_t mem_size;
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uint32_t *virt_to_phys(uint32_t *virt_addr);
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uint32_t *virt_to_phys(uint32_t *virt_addr);
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void init_memory(void);
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void init_memory(void);
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@ -34,6 +34,7 @@ boot_page_table1:
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# The kernel entry point.
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# The kernel entry point.
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.section .multiboot.text, "a"
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.section .multiboot.text, "a"
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.global _start
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.global _start
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.global end_mem
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.type _start, @function
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.type _start, @function
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_start:
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_start:
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# Physical address of boot_page_table1.
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# Physical address of boot_page_table1.
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@ -89,6 +90,10 @@ _start:
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movl $(boot_page_directory - 0xC0000000), %ecx
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movl $(boot_page_directory - 0xC0000000), %ecx
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movl %ecx, %cr3
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movl %ecx, %cr3
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jmp set_mem_size
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end_mem:
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# Enable paging and the write-protect bit.
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# Enable paging and the write-protect bit.
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movl %cr0, %ecx
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movl %cr0, %ecx
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orl $0x80000000, %ecx
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orl $0x80000000, %ecx
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@ -113,9 +118,6 @@ _start:
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# Set up the stack.
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# Set up the stack.
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mov $stack_top, %esp
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mov $stack_top, %esp
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push %eax
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push %ebx
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# Enter the high-level kernel.
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# Enter the high-level kernel.
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call kernel_main
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call kernel_main
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@ -31,7 +31,8 @@
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* feeling qui me donnerait envie de continuer dans une relation "couple" sur le
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* feeling qui me donnerait envie de continuer dans une relation "couple" sur le
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* long terme. Je sais pas trop comment le dire sans que ça te blesse, c'est pas
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* long terme. Je sais pas trop comment le dire sans que ça te blesse, c'est pas
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* personnel ou quoi c'est cool quand on parle et tout mais juste je ne pense
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* personnel ou quoi c'est cool quand on parle et tout mais juste je ne pense
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* pas pouvoir faire marcher une relation comme celle là :( */ /* Voilà je voulais juste te le dire pour pas que tu te mettes quelque chose en
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* pas pouvoir faire marcher une relation comme celle là :( */
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/* Voilà je voulais juste te le dire pour pas que tu te mettes quelque chose en
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* tête qui n'arrivera pas, je trouve ça plus correct */
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* tête qui n'arrivera pas, je trouve ça plus correct */
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static void set_mem_size(multiboot_info_t *mbd, uint32_t magic)
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static void set_mem_size(multiboot_info_t *mbd, uint32_t magic)
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@ -54,14 +55,14 @@ static void set_mem_size(multiboot_info_t *mbd, uint32_t magic)
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}
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}
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}
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}
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void kernel_main(multiboot_info_t *mbd, uint32_t magic)
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void kernel_main(void)
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{
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{
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terminal_initialize();
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terminal_initialize();
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init_gdt();
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init_gdt();
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init_idt();
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init_idt();
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init_memory();
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init_memory();
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load_drivers();
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load_drivers();
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set_mem_size(mbd, magic);
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/* set_mem_size(mbd, magic); */
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kprintf(KERN_ALERT
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kprintf(KERN_ALERT
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"I see no way to confuse an array of 256 seg:off pairs with a "
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"I see no way to confuse an array of 256 seg:off pairs with a "
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"complex 8*unknown quantity -byte descriptor table. -- Troy "
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"complex 8*unknown quantity -byte descriptor table. -- Troy "
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@ -6,7 +6,7 @@
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uint32_t *page_directory = &boot_page_directory;
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uint32_t *page_directory = &boot_page_directory;
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uint32_t page_table_default[1024] __attribute__((aligned(4096)));
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uint32_t page_table_default[1024] __attribute__((aligned(4096)));
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uint32_t mem_size;
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uint64_t mem_size;
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void init_memory(void)
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void init_memory(void)
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{
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{
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27
src/set_mem_size.s
Normal file
27
src/set_mem_size.s
Normal file
@ -0,0 +1,27 @@
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.intel_syntax noprefix
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.section .text
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.global set_mem_size
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set_mem_size:
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xor ebx, ebx
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.L1:
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// loop condition
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cmp ebx, [eax + 64]
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jge end_mem
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// declare mmmt
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mov ecx, [eax + 68]
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add ecx, ebx
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// check if the mmmt->type is available (1)
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cmp DWORD PTR [ecx + 20], 1
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jne .L2
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// add the size of the block
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mov edx, [ecx + 12]
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add DWORD PTR mem_size, edx
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mov edx, [ecx + 16]
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add DWORD PTR mem_size + 4, edx
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.L2:
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add ebx, 24
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jmp .L1
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