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| author | Rushikesh S Kadam <rushikesh.s.kadam@intel.com> | 2018-11-03 01:48:18 +0530 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2018-12-11 09:24:26 +0000 |
| commit | 2454467d04997802025102539e8f234e16f6a706 (patch) | |
| tree | cdb7b90f345ac71772ea67f8d98298fd29668637 | |
| parent | 649511831794a787d034378a47aac09b54fd6806 (diff) | |
| download | chrome-ec-2454467d04997802025102539e8f234e16f6a706.tar.gz | |
core/minute-ia: Setup GDT
Setup GDT for main ISH FW
BRANCH=none
BUG=b:120051488
TEST=Verify that main ISH FW runs fine when loaded through host FW load flow.
Change-Id: I8101de6c2482abb09ccc8fdc36321fa562e521d7
Signed-off-by: Rushikesh S Kadam <rushikesh.s.kadam@intel.com>
Signed-off-by: Sadashiva Rao Pv <sadashiva.rao.pv@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/1316700
Commit-Ready: Caveh Jalali <caveh@google.com>
Reviewed-by: Caveh Jalali <caveh@google.com>
(cherry picked from commit f645b4591de099c245dd8e69bdc785134fdfdb7a)
Reviewed-on: https://chromium-review.googlesource.com/c/1365151
Commit-Queue: Caveh Jalali <caveh@google.com>
Tested-by: Caveh Jalali <caveh@google.com>
| -rw-r--r-- | core/minute-ia/init.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/core/minute-ia/init.S b/core/minute-ia/init.S index 054de9c4e3..5ba0cbf581 100644 --- a/core/minute-ia/init.S +++ b/core/minute-ia/init.S @@ -286,12 +286,38 @@ interrupt_descriptor interrupt_descriptor interrupt_descriptor # 255 +__gdt: + # Entry 0: Null descriptor + .word 0x0000 + .word 0x0000 + .byte 0x00 + .byte 0x00 + .byte 0x00 + .byte 0x00 + # Entry 1: Code descriptor + .word 0xffff # Limit: xffff + .word 0x0000 # Base: xxxx0000 + .byte 0x00 # Base: xx00xxxx + .byte 0x9b # Code E/R, Present, DPL0, Acesssed=1 + .byte 0xcf # Limit fxxxx, Page Gra, 32 bit + .byte 0x00 # Base: 00xxxxxx + # Entry 0: Data descriptor + .word 0xffff # Limit: xffff + .word 0x0000 # Base: xxxx0000 + .byte 0x00 # Base: xx00xxxx + .byte 0x93 # Data R/W, Present, DPL0, Acesssed=1 + .byte 0xcf # Limit fxxxx, Page Gra, 32 bit + .byte 0x00 # Base: 00xxxxxx + #.section .data __idt_ptr: .word 2047 # Table size in bytes, count from 0 # (8N - 1). N = 256 - the number of vectors .long __idt # Base address of IDT +__gdt_ptr: + .word 24 + .long __gdt .section .init .code32 @@ -316,6 +342,9 @@ reset: # System stack is within .bss, already cleared movl $stack_end, %esp + # Load GDT + lgdt __gdt_ptr + # Load IDT lidt __idt_ptr |