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x86: Fix x86 Cold Boot

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Commit 077e1958ca broke the ability of the
x86 port to boot from a cold-reset by removing the initial IDT. Re-
instate the initial IDT to allow cold-booting of x86 boards
This commit is contained in:
Graeme Russ 2010-08-22 16:25:59 +10:00
parent a806ee6fae
commit 797960fda1
1 changed files with 5 additions and 0 deletions
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5
arch/i386/cpu/start16.S
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@ -45,6 +45,7 @@ board_init16_ret:
wbinvd wbinvd
/* load the temporary Global Descriptor Table */ /* load the temporary Global Descriptor Table */
o32 cs lidt idt_ptr
o32 cs lgdt gdt_ptr o32 cs lgdt gdt_ptr
/* Now, we enter protected mode */ /* Now, we enter protected mode */
@ -68,6 +69,10 @@ code32start:
.long _start /* offset */ .long _start /* offset */
.word 0x10 /* segment */ .word 0x10 /* segment */
idt_ptr:
.word 0 /* limit */
.long 0 /* base */
/* /*
* The following Global Descriptor Table is just enough to get us into * The following Global Descriptor Table is just enough to get us into
* 'Flat Protected Mode' - It will be discarded as soon as the final * 'Flat Protected Mode' - It will be discarded as soon as the final