arch/powerpc/boot/ps3-hvcall.S

Source file repositories/reference/linux-study-clean/arch/powerpc/boot/ps3-hvcall.S

File Facts

System
Linux kernel
Corpus path
arch/powerpc/boot/ps3-hvcall.S
Extension
.S
Size
2365 bytes
Lines
175
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: arch/powerpc
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 "ppc_asm.h"

	.machine "ppc64"

/*
 * The PS3 hypervisor uses a 64 bit "C" language calling convention.
 * The routines here marshal arguments between the 32 bit wrapper
 * program and the 64 bit hvcalls.
 *
 *  wrapper           lv1
 *  32-bit (h,l)      64-bit
 *
 *  1: r3,r4          <-> r3
 *  2: r5,r6          <-> r4
 *  3: r7,r8          <-> r5
 *  4: r9,r10         <-> r6
 *  5: 8(r1),12(r1)   <-> r7
 *  6: 16(r1),20(r1)  <-> r8
 *  7: 24(r1),28(r1)  <-> r9
 *  8: 32(r1),36(r1)  <-> r10
 *
 */

.macro GLOBAL name
	.section ".text"
	.balign 4
	.globl \name
\name:
.endm

.macro NO_SUPPORT name
	GLOBAL \name
	b ps3_no_support
.endm

.macro HVCALL num
	li r11, \num
	.long 0x44000022
	extsw r3, r3
.endm

.macro SAVE_LR offset=4
	mflr r0
	stw r0, \offset(r1)
.endm

.macro LOAD_LR offset=4
	lwz r0, \offset(r1)
	mtlr r0
.endm

.macro LOAD_64_REG target,high,low
	sldi r11, \high, 32
	or \target, r11, \low
.endm

.macro LOAD_64_STACK target,offset
	ld \target, \offset(r1)
.endm

.macro LOAD_R3
	LOAD_64_REG r3,r3,r4
.endm

.macro LOAD_R4
	LOAD_64_REG r4,r5,r6
.endm

.macro LOAD_R5
	LOAD_64_REG r5,r7,r8

Annotation

Implementation Notes