arch/microblaze/kernel/misc.S

Source file repositories/reference/linux-study-clean/arch/microblaze/kernel/misc.S

File Facts

System
Linux kernel
Corpus path
arch/microblaze/kernel/misc.S
Extension
.S
Size
1389 bytes
Lines
67
Domain
Architecture Layer
Bucket
arch/microblaze
Inferred role
Architecture Layer: arch/microblaze
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/sys.h>
#include <asm/unistd.h>
#include <linux/errno.h>
#include <asm/mmu.h>
#include <asm/page.h>

	.text
/*
 * Flush MMU TLB
 *
 * We avoid flushing the pinned 0, 1 and possibly 2 entries.
 */
.globl _tlbia;
.type  _tlbia, @function
.align 4;
_tlbia:
	lwi	r12, r0, tlb_skip;
	/* isync */
_tlbia_1:
	mts	rtlbx, r12
	nop
	mts	rtlbhi, r0 /* flush: ensure V is clear */
	nop
	rsubi	r11, r12, MICROBLAZE_TLB_SIZE - 1
	bneid	r11, _tlbia_1 /* loop for all entries */
	addik	r12, r12, 1
	mbar	1 /* sync */
	rtsd	r15, 8
	nop
	.size  _tlbia, . - _tlbia

/*
 * Flush MMU TLB for a particular address (in r5)
 */
.globl _tlbie;
.type  _tlbie, @function
.align 4;
_tlbie:
	mts	rtlbsx, r5 /* look up the address in TLB */
	nop
	mfs	r12, rtlbx /* Retrieve index */
	nop
	blti	r12, _tlbie_1 /* Check if found */
	mts	rtlbhi, r0 /* flush: ensure V is clear */
	nop
	mbar	1 /* sync */
_tlbie_1:
	rtsd	r15, 8
	nop

	.size  _tlbie, . - _tlbie

Annotation

Implementation Notes