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Kernel: Expand the kernel memory slot from 16 MiB to 32 MiB

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Like in 8cd5477e54, we need to expand the
kernel slot again to be able to boot again.
This commit is contained in:
Liav A 2021-05-14 15:34:26 +03:00 committed by Andreas Kling
parent 7078119c58
commit dac129e10b
Notes: sideshowbarker 2024-07-18 18:00:44 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/dac129e10bd
Pull-request: https://github.com/SerenityOS/serenity/pull/6277
Reviewed-by: https://github.com/ElectrodeYT
Reviewed-by: https://github.com/awesomekling
3 changed files with 18 additions and 8 deletions
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22
Kernel/Arch/i386/Boot/boot.S
View File

@ -51,7 +51,7 @@ boot_pd0_pt0:
.skip 4096 * 4
.global boot_pd3_pts
boot_pd3_pts:
.skip 4096 * 8
.skip 4096 * 16
.global boot_pd3_pt1023
boot_pd3_pt1023:
.skip 4096
@ -91,7 +91,17 @@ boot_pd3 : 512 pde's
5: boot_pd3_pts[5] (3082-3084MB) (pseudo 512 4KB pages)
6: boot_pd3_pts[6] (3084-3086MB) (pseudo 512 4KB pages)
7: boot_pd3_pts[7] (3086-3088MB) (pseudo 512 4KB pages)
8: boot_pd3_pt1023 (4094-4096MB) (for page table mappings)
8: boot_pd3_pts[8] (3088-3090MB) (pseudo 512 4KB pages)
9: boot_pd3_pts[9] (3090-3076MB) (pseudo 512 4KB pages)
10: boot_pd3_pts[10] (3092-3094MB) (pseudo 512 4KB pages)
11: boot_pd3_pts[11] (3094-3096MB) (pseudo 512 4KB pages)
12: boot_pd3_pts[12] (3096-3098MB) (pseudo 512 4KB pages)
13: boot_pd3_pts[13] (3098-3100MB) (pseudo 512 4KB pages)
14: boot_pd3_pts[14] (3100-3102MB) (pseudo 512 4KB pages)
15: boot_pd3_pts[15] (3102-3104MB) (pseudo 512 4KB pages)
16: boot_pd3_pt1023 (4094-4096MB) (for page table mappings)
the 9 page tables each contain 512 pte's that map individual 4KB pages
@ -145,7 +155,7 @@ start:
/* clear pd3's pt's */
movl $(boot_pd3_pts - 0xc0000000), %edi
movl $(1024 * 9), %ecx
movl $(1024 * 17), %ecx
xorl %eax, %eax
rep stosl
@ -157,7 +167,7 @@ start:
orl $0x3, 0(%edi)
/* add boot_pd3_pts to boot_pd3 */
movl $8, %ecx
movl $16, %ecx
movl $(boot_pd3 - 0xc0000000), %edi
movl $(boot_pd3_pts - 0xc0000000), %eax
@ -182,8 +192,8 @@ start:
addl $4096, %eax
loop 1b
/* pseudo identity map the 3072-3090MB range */
movl $(512 * 8), %ecx
/* pseudo identity map the 3072-3102MB range */
movl $(512 * 16), %ecx
movl $(boot_pd3_pts - 0xc0000000), %edi
xorl %eax, %eax

2
Kernel/VM/PageDirectory.cpp
View File

@ -36,7 +36,7 @@ extern "C" PageDirectoryEntry boot_pd3[1024];
UNMAP_AFTER_INIT PageDirectory::PageDirectory()
{
m_range_allocator.initialize_with_range(VirtualAddress(0xc1000000), 0x30800000);
m_range_allocator.initialize_with_range(VirtualAddress(0xc2000000), 0x2f000000);
m_identity_range_allocator.initialize_with_range(VirtualAddress(FlatPtr(0x00000000)), 0x00200000);
// Adopt the page tables already set up by boot.S

2
Kernel/init.cpp
View File

@ -104,7 +104,7 @@ static Processor s_bsp_processor; // global but let's keep it "private"
extern "C" UNMAP_AFTER_INIT [[noreturn]] void init()
{
if ((FlatPtr)&end_of_kernel_image >= 0xc1000000u) {
if ((FlatPtr)&end_of_kernel_image >= 0xc2000000u) {
// The kernel has grown too large again!
asm volatile("cli;hlt");
}