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Subject[PATCH] visws: export boottime gdt descriptor (4/13)
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Hi.

This simple patch exports boottime gdt descriptor from trampoline.S.
Visws uses it to initialize bootup cpu before running the rest of head.S

Please consider applying.

Best regards.

--
Andrey Panin | Embedded systems software developer
pazke@orbita1.ru | PGP key: wwwkeys.pgp.net
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/kernel/trampoline.S linux-2.5.60/arch/i386/kernel/trampoline.S
--- linux-2.5.60.vanilla/arch/i386/kernel/trampoline.S Tue Jan 14 12:32:27 2003
+++ linux-2.5.60/arch/i386/kernel/trampoline.S Fri Feb 14 15:12:28 2003
@@ -46,8 +47,8 @@
movl $0xA5A5A5A5, trampoline_data - r_base
# write marker for master knows we're running

- lidt idt_48 - r_base # load idt with 0, 0
- lgdt gdt_48 - r_base # load gdt with whatever is appropriate
+ lidt boot_idt - r_base # load idt with 0, 0
+ lgdt boot_gdt - r_base # load gdt with whatever is appropriate

xor %ax, %ax
inc %ax # protected mode (PE) bit
@@ -57,7 +58,7 @@
ljmpl $__BOOT_CS, $0x00100000
# jump to startup_32 in arch/i386/kernel/head.S

-idt_48:
+boot_idt:
.word 0 # idt limit = 0
.word 0, 0 # idt base = 0L

@@ -65,8 +66,7 @@
# NOTE: here we actually use CPU#0's GDT - but that is OK, we reload
# the proper GDT shortly after booting up the secondary CPUs.
#
-
-gdt_48:
+ENTRY(boot_gdt)
.word __BOOT_DS + 7 # gdt limit
.long boot_gdt_table-__PAGE_OFFSET # gdt base = gdt (first SMP CPU)
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