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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
3 changed files with 18 additions and 8 deletions
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22
Kernel/Arch/i386/Boot/boot.S
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@ -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