linux/arch/arm/kernel/entry-header.S

#include <linux/config.h> /* for CONFIG_ARCH_xxxx */
#include <linux/linkage.h>

#include <asm/assembler.h>
#include <asm/constants.h>
#include <asm/errno.h>
#include <asm/hardware.h>
#include <asm/arch/irqs.h>
#include <asm/arch/entry-macro.S>

	.macro	zero_fp
#ifdef CONFIG_FRAME_POINTER
	mov	fp, #0
#endif
	.endm

	.text

@ Bad Abort numbers
@ -----------------
@
#define BAD_PREFETCH	0
#define BAD_DATA	1
#define BAD_ADDREXCPTN	2
#define BAD_IRQ		3
#define BAD_UNDEFINSTR	4

@
@ Most of the stack format comes from struct pt_regs, but with
@ the addition of 8 bytes for storing syscall args 5 and 6.
@
#define S_OFF		8

/* 
 * The SWI code relies on the fact that R0 is at the bottom of the stack
 * (due to slow/fast restore user regs).
 */
#if S_R0 != 0
#error "Please fix"
#endif

#if __LINUX_ARM_ARCH__ >= 6
	.macro	disable_irq
	cpsid	i
	.endm

	.macro	enable_irq
	cpsie	i
	.endm
#else
	.macro	disable_irq
	msr	cpsr_c, #PSR_I_BIT | SVC_MODE
	.endm

	.macro	enable_irq
	msr	cpsr_c, #SVC_MODE
	.endm
#endif

	.macro	get_thread_info, rd
	mov	\rd, sp, lsr #13
	mov	\rd, \rd, lsl #13
	.endm

	.macro	alignment_trap, rbase, rtemp, sym
#ifdef CONFIG_ALIGNMENT_TRAP
#define OFF_CR_ALIGNMENT(x)	cr_alignment - x

	ldr	\rtemp, [\rbase, #OFF_CR_ALIGNMENT(\sym)]
	mcr	p15, 0, \rtemp, c1, c0
#endif
	.endm


/*
 * These are the registers used in the syscall handler, and allow us to
 * have in theory up to 7 arguments to a function - r0 to r6.
 *
 * r7 is reserved for the system call number for thumb mode.
 *
 * Note that tbl == why is intentional.
 *
 * We must set at least "tsk" and "why" when calling ret_with_reschedule.
 */
scno	.req	r7		@ syscall number
tbl	.req	r8		@ syscall table pointer
why	.req	r8		@ Linux syscall (!= 0)
tsk	.req	r9		@ current thread_info
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 15:20:36 -07:00			`#include <linux/config.h> /* for CONFIG_ARCH_xxxx */`
			`#include <linux/linkage.h>`

			`#include <asm/assembler.h>`
			`#include <asm/constants.h>`
			`#include <asm/errno.h>`
			`#include <asm/hardware.h>`
			`#include <asm/arch/irqs.h>`
			`#include <asm/arch/entry-macro.S>`

			`.macro zero_fp`
			`#ifdef CONFIG_FRAME_POINTER`
			`mov fp, #0`
			`#endif`
			`.endm`

			`.text`

			`@ Bad Abort numbers`
			`@ -----------------`
			`@`
			`#define BAD_PREFETCH 0`
			`#define BAD_DATA 1`
			`#define BAD_ADDREXCPTN 2`
			`#define BAD_IRQ 3`
			`#define BAD_UNDEFINSTR 4`

			`@`
[PATCH] ARM: pt_regs offsets Generate pt_regs S_xx offsets from the structure itself instead of #defining them. Signed-off-by: Russell King <rmk@arm.linux.org.uk> 2005-04-26 15:18:59 +01:00			`@ Most of the stack format comes from struct pt_regs, but with`
			`@ the addition of 8 bytes for storing syscall args 5 and 6.`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 15:20:36 -07:00			`@`
			`#define S_OFF 8`

[PATCH] ARM: pt_regs offsets Generate pt_regs S_xx offsets from the structure itself instead of #defining them. Signed-off-by: Russell King <rmk@arm.linux.org.uk> 2005-04-26 15:18:59 +01:00			`/*`
			`* The SWI code relies on the fact that R0 is at the bottom of the stack`
			`* (due to slow/fast restore user regs).`
			`*/`
			`#if S_R0 != 0`
			`#error "Please fix"`
			`#endif`

Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 15:20:36 -07:00			`#if __LINUX_ARM_ARCH__ >= 6`
[PATCH] ARM: Remove argument for disable_irq/enable_irq Since we do not require a register for these operations, we can remove this unnecessary argument. Signed-off-by: Russell King <rmk@arm.linux.org.uk> 2005-04-26 15:18:26 +01:00			`.macro disable_irq`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 15:20:36 -07:00			`cpsid i`
			`.endm`

[PATCH] ARM: Remove argument for disable_irq/enable_irq Since we do not require a register for these operations, we can remove this unnecessary argument. Signed-off-by: Russell King <rmk@arm.linux.org.uk> 2005-04-26 15:18:26 +01:00			`.macro enable_irq`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 15:20:36 -07:00			`cpsie i`
			`.endm`
			`#else`
[PATCH] ARM: Remove argument for disable_irq/enable_irq Since we do not require a register for these operations, we can remove this unnecessary argument. Signed-off-by: Russell King <rmk@arm.linux.org.uk> 2005-04-26 15:18:26 +01:00			`.macro disable_irq`
			`msr cpsr_c, #PSR_I_BIT \| SVC_MODE`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 15:20:36 -07:00			`.endm`

[PATCH] ARM: Remove argument for disable_irq/enable_irq Since we do not require a register for these operations, we can remove this unnecessary argument. Signed-off-by: Russell King <rmk@arm.linux.org.uk> 2005-04-26 15:18:26 +01:00			`.macro enable_irq`
			`msr cpsr_c, #SVC_MODE`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-16 15:20:36 -07:00			`.endm`
			`#endif`

			`.macro get_thread_info, rd`
			`mov \rd, sp, lsr #13`
			`mov \rd, \rd, lsl #13`
			`.endm`

			`.macro alignment_trap, rbase, rtemp, sym`
			`#ifdef CONFIG_ALIGNMENT_TRAP`
			`#define OFF_CR_ALIGNMENT(x) cr_alignment - x`

			`ldr \rtemp, [\rbase, #OFF_CR_ALIGNMENT(\sym)]`
			`mcr p15, 0, \rtemp, c1, c0`
			`#endif`
			`.endm`


			`/*`
			`* These are the registers used in the syscall handler, and allow us to`
			`* have in theory up to 7 arguments to a function - r0 to r6.`
			`*`
			`* r7 is reserved for the system call number for thumb mode.`
			`*`
			`* Note that tbl == why is intentional.`
			`*`
			`* We must set at least "tsk" and "why" when calling ret_with_reschedule.`
			`*/`
			`scno .req r7 @ syscall number`
			`tbl .req r8 @ syscall table pointer`
			`why .req r8 @ Linux syscall (!= 0)`
			`tsk .req r9 @ current thread_info`