diff options
| author | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-07-13 09:39:15 +0200 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-07-13 21:04:56 +0200 |
| commit | 6cb3a59fd5e754c3627b79db21c5bcc284bfd721 (patch) | |
| tree | e83db5b11ee4a29d496dcf2798d024b6b8455ab7 /src/arch/x86/thread_switch.S | |
| parent | 9693885ad88d21ead7bd9ebc32f3e4901841b18b (diff) | |
x86: flatten hierarchy
It never made sense to have bootblock_* in init, but
pirq_routing.c in boot, and some ld scripts on the main
level while others live in subdirectories.
This patch flattens the directory hierarchy and makes
x86 more similar to the other architectures.
Change-Id: I4056038fe7813e4d3d3042c441e7ab6076a36384
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10901
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/arch/x86/thread_switch.S')
| -rw-r--r-- | src/arch/x86/thread_switch.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/arch/x86/thread_switch.S b/src/arch/x86/thread_switch.S new file mode 100644 index 0000000000..52d4d3094b --- /dev/null +++ b/src/arch/x86/thread_switch.S @@ -0,0 +1,58 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc. + */ +.code32 +.text + +/* + * stack layout after pushad: + * +------------+ + * | save stack | <-- esp + 0x28 + * +------------+ + * | new stack | <-- esp + 0x24 + * +------------+ + * | ret addr | <-- esp + 0x20 + * +------------+ + * | eax | <-- esp + 0x1c + * +------------+ + * | ecx | <-- esp + 0x18 + * +------------+ + * | edx | <-- esp + 0x14 + * +------------+ + * | ebx | <-- esp + 0x10 + * +------------+ + * | orig esp | <-- esp + 0x0c + * +------------+ + * | ebp | <-- esp + 0x08 + * +------------+ + * | esi | <-- esp + 0x04 + * +------------+ + * | edi | <-- esp + 0x00 + * +------------+ + */ +.globl switch_to_thread +switch_to_thread: + pusha + /* Save the current stack */ + movl 0x28(%esp), %ebx + movl %esp, (%ebx) + /* Switch to the new stack. */ + movl 0x24(%esp), %eax + movl %eax, %esp + popa + ret |