arch/arm/mach-rpc/ecard-loader.S

Source file repositories/reference/linux-study-clean/arch/arm/mach-rpc/ecard-loader.S

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-rpc/ecard-loader.S
Extension
.S
Size
874 bytes
Lines
41
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 <asm/assembler.h>

#define CPSR2SPSR(rt) \
		mrs	rt, cpsr; \
		msr	spsr_cxsf, rt

@ Purpose: call an expansion card loader to read bytes.
@ Proto  : char read_loader(int offset, char *card_base, char *loader);
@ Returns: byte read

ENTRY(ecard_loader_read)
		stmfd	sp!, {r4 - r12, lr}
		mov	r11, r1
		mov	r1, r0
		CPSR2SPSR(r0)
		mov	lr, pc
		mov	pc, r2
		ldmfd	sp!, {r4 - r12, pc}

@ Purpose: call an expansion card loader to reset the card
@ Proto  : void read_loader(int card_base, char *loader);
@ Returns: byte read

ENTRY(ecard_loader_reset)
		stmfd	sp!, {r4 - r12, lr}
		mov	r11, r0
		CPSR2SPSR(r0)
		mov	lr, pc
		add	pc, r1, #8
		ldmfd	sp!, {r4 - r12, pc}

Annotation

Implementation Notes