arch/parisc/kernel/pacache.S

Source file repositories/reference/linux-study-clean/arch/parisc/kernel/pacache.S

File Facts

System
Linux kernel
Corpus path
arch/parisc/kernel/pacache.S
Extension
.S
Size
32138 bytes
Lines
1296
Domain
Architecture Layer
Bucket
arch/parisc
Inferred role
Architecture Layer: arch/parisc
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

#ifdef CONFIG_64BIT
	.level	2.0w
#else
	.level	2.0
#endif

#include <asm/psw.h>
#include <asm/assembly.h>
#include <asm/cache.h>
#include <asm/ldcw.h>
#include <asm/alternative.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/pgtable.h>

	.section .text.hot
	.align	16

ENTRY_CFI(flush_tlb_all_local)
	/*
	 * The pitlbe and pdtlbe instructions should only be used to
	 * flush the entire tlb. Also, there needs to be no intervening
	 * tlb operations, e.g. tlb misses, so the operation needs
	 * to happen in real mode with all interruptions disabled.
	 */

	/* pcxt_ssm_bug	- relied upon translation! PA 2.0 Arch. F-4 and F-5 */
	rsm		PSW_SM_I, %r19		/* save I-bit state */
	load32		PA(1f), %r1
	nop
	nop
	nop
	nop
	nop

	rsm		PSW_SM_Q, %r0		/* prep to load iia queue */
	mtctl		%r0, %cr17		/* Clear IIASQ tail */
	mtctl		%r0, %cr17		/* Clear IIASQ head */
	mtctl		%r1, %cr18		/* IIAOQ head */
	ldo		4(%r1), %r1
	mtctl		%r1, %cr18		/* IIAOQ tail */
	load32		REAL_MODE_PSW, %r1
	mtctl           %r1, %ipsw
	rfi
	nop

1:      load32		PA(cache_info), %r1

	/* Flush Instruction Tlb */

88:	LDREG		ITLB_SID_BASE(%r1), %r20
	LDREG		ITLB_SID_STRIDE(%r1), %r21
	LDREG		ITLB_SID_COUNT(%r1), %r22
	LDREG		ITLB_OFF_BASE(%r1), %arg0
	LDREG		ITLB_OFF_STRIDE(%r1), %arg1
	LDREG		ITLB_OFF_COUNT(%r1), %arg2
	LDREG		ITLB_LOOP(%r1), %arg3

	addib,COND(=)		-1, %arg3, fitoneloop	/* Preadjust and test */
	movb,<,n	%arg3, %r31, fitdone	/* If loop < 0, skip */
	copy		%arg0, %r28		/* Init base addr */

fitmanyloop:					/* Loop if LOOP >= 2 */
	mtsp		%r20, %sr1
	add		%r21, %r20, %r20	/* increment space */
	copy		%arg2, %r29		/* Init middle loop count */

fitmanymiddle:					/* Loop if LOOP >= 2 */
	addib,COND(>)		-1, %r31, fitmanymiddle	/* Adjusted inner loop decr */
	pitlbe		%r0(%sr1, %r28)

Annotation

Implementation Notes