arch/arm/mm/proc-arm9tdmi.S

Source file repositories/reference/linux-study-clean/arch/arm/mm/proc-arm9tdmi.S

File Facts

System
Linux kernel
Corpus path
arch/arm/mm/proc-arm9tdmi.S
Extension
.S
Size
2538 bytes
Lines
104
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: arch/arm
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/cfi_types.h>
#include <linux/pgtable.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/hwcap.h>
#include <asm/pgtable-hwdef.h>
#include <asm/ptrace.h>

#include "proc-macros.S"

	.text
/*
 * cpu_arm9tdmi_proc_init()
 * cpu_arm9tdmi_do_idle()
 * cpu_arm9tdmi_dcache_clean_area()
 * cpu_arm9tdmi_switch_mm()
 *
 * These are not required.
 */
SYM_TYPED_FUNC_START(cpu_arm9tdmi_proc_init)
		ret	lr
SYM_FUNC_END(cpu_arm9tdmi_proc_init)

SYM_TYPED_FUNC_START(cpu_arm9tdmi_do_idle)
		ret	lr
SYM_FUNC_END(cpu_arm9tdmi_do_idle)

SYM_TYPED_FUNC_START(cpu_arm9tdmi_dcache_clean_area)
		ret	lr
SYM_FUNC_END(cpu_arm9tdmi_dcache_clean_area)

SYM_TYPED_FUNC_START(cpu_arm9tdmi_switch_mm)
		ret	lr
SYM_FUNC_END(cpu_arm9tdmi_switch_mm)

/*
 * cpu_arm9tdmi_proc_fin()
 */
SYM_TYPED_FUNC_START(cpu_arm9tdmi_proc_fin)
		ret	lr
SYM_FUNC_END(cpu_arm9tdmi_proc_fin)

/*
 * Function: cpu_arm9tdmi_reset(loc)
 * Params  : loc(r0)	address to jump to
 * Purpose : Sets up everything for a reset and jump to the location for soft reset.
 */
		.pushsection	.idmap.text, "ax"
SYM_TYPED_FUNC_START(cpu_arm9tdmi_reset)
		ret	r0
SYM_FUNC_END(cpu_arm9tdmi_reset)
		.popsection

		.type	__arm9tdmi_setup, #function
__arm9tdmi_setup:
		ret	lr
		.size	__arm9tdmi_setup, . - __arm9tdmi_setup

		__INITDATA

		@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
		define_processor_functions arm9tdmi, dabort=nommu_early_abort, pabort=legacy_pabort, nommu=1

		.section ".rodata"

		string	cpu_arch_name, "armv4t"
		string	cpu_elf_name, "v4"
		string	cpu_arm9tdmi_name, "ARM9TDMI"

Annotation

Implementation Notes