1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * linux/arch/arm/boot/compressed/head-xscale.S
 4 *
 5 * XScale specific tweaks.  This is merged into head.S by the linker.
 6 *
 7 */
 8
 9#include <linux/linkage.h>
10
11		.section        ".start", "ax"
12
13__XScale_start:
14
15		@ Preserve r8/r7 i.e. kernel entry values
16
17		@ Data cache might be active.
18		@ Be sure to flush kernel binary out of the cache,
19		@ whatever state it is, before it is turned off.
20		@ This is done by fetching through currently executed
21		@ memory to be sure we hit the same cache.
22		bic	r2, pc, #0x1f
23		add	r3, r2, #0x10000	@ 64 kb is quite enough...
241:		ldr	r0, [r2], #32
25		teq	r2, r3
26		bne	1b
27		mcr	p15, 0, r0, c7, c10, 4	@ drain WB
28		mcr	p15, 0, r0, c7, c7, 0	@ flush I & D caches
29
30		@ disabling MMU and caches
31		mrc	p15, 0, r0, c1, c0, 0	@ read control reg
32		bic	r0, r0, #0x05		@ clear DC, MMU
33		bic	r0, r0, #0x1000		@ clear Icache
34		mcr	p15, 0, r0, c1, c0, 0
35

 
 1/*
 2 * linux/arch/arm/boot/compressed/head-xscale.S
 3 *
 4 * XScale specific tweaks.  This is merged into head.S by the linker.
 5 *
 6 */
 7
 8#include <linux/linkage.h>
 9
10		.section        ".start", "ax"
11
12__XScale_start:
13
14		@ Preserve r8/r7 i.e. kernel entry values
15
16		@ Data cache might be active.
17		@ Be sure to flush kernel binary out of the cache,
18		@ whatever state it is, before it is turned off.
19		@ This is done by fetching through currently executed
20		@ memory to be sure we hit the same cache.
21		bic	r2, pc, #0x1f
22		add	r3, r2, #0x10000	@ 64 kb is quite enough...
231:		ldr	r0, [r2], #32
24		teq	r2, r3
25		bne	1b
26		mcr	p15, 0, r0, c7, c10, 4	@ drain WB
27		mcr	p15, 0, r0, c7, c7, 0	@ flush I & D caches
28
29		@ disabling MMU and caches
30		mrc	p15, 0, r0, c1, c0, 0	@ read control reg
31		bic	r0, r0, #0x05		@ clear DC, MMU
32		bic	r0, r0, #0x1000		@ clear Icache
33		mcr	p15, 0, r0, c1, c0, 0
34