2f79eb3fd5
Change-Id: I24d219b4ce6033f64886e22973ca8716113d319f Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/27919 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin Roth <martinroth@google.com>
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <thread.h>
|
|
|
|
/* The stack frame looks like the following after a pushad instruction. */
|
|
struct pushad_regs {
|
|
uint32_t edi; /* Offset 0x00 */
|
|
uint32_t esi; /* Offset 0x04 */
|
|
uint32_t ebp; /* Offset 0x08 */
|
|
uint32_t esp; /* Offset 0x0c */
|
|
uint32_t ebx; /* Offset 0x10 */
|
|
uint32_t edx; /* Offset 0x14 */
|
|
uint32_t ecx; /* Offset 0x18 */
|
|
uint32_t eax; /* Offset 0x1c */
|
|
};
|
|
|
|
static inline uintptr_t push_stack(uintptr_t cur_stack, uintptr_t value)
|
|
{
|
|
uintptr_t *addr;
|
|
|
|
cur_stack -= sizeof(value);
|
|
addr = (uintptr_t *)cur_stack;
|
|
*addr = value;
|
|
return cur_stack;
|
|
}
|
|
|
|
void arch_prepare_thread(struct thread *t,
|
|
asmlinkage void (*thread_entry)(void *), void *arg)
|
|
{
|
|
uintptr_t stack = t->stack_current;
|
|
|
|
/* Imitate thread_entry(t) with return address of 0. thread_entry()
|
|
* is assumed to never return. */
|
|
stack = push_stack(stack, (uintptr_t)arg);
|
|
stack = push_stack(stack, (uintptr_t)0);
|
|
stack = push_stack(stack, (uintptr_t)thread_entry);
|
|
/* Make room for the registers. Ignore initial values. */
|
|
stack -= sizeof(struct pushad_regs);
|
|
|
|
t->stack_current = stack;
|
|
}
|
|
|
|
void *arch_get_thread_stackbase(void)
|
|
{
|
|
/* defined in c_start.S */
|
|
extern u8 thread_stacks[];
|
|
return &thread_stacks[0];
|
|
}
|