u-boot-brain/arch/arm/cpu/armv8/tlb.S

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * (C) Copyright 2013
 * David Feng <fenghua@phytium.com.cn>
 */

#include <asm-offsets.h>
#include <config.h>
#include <linux/linkage.h>
#include <asm/macro.h>

/*
 * void __asm_invalidate_tlb_all(void)
 *
 * invalidate all tlb entries.
*/
.pushsection .text.__asm_invalidate_tlb_all, "ax"
ENTRY(__asm_invalidate_tlb_all)
	switch_el x9, 3f, 2f, 1f
3:	tlbi	alle3
	dsb	sy
	isb
	b	0f
2:	tlbi	alle2
	dsb	sy
	isb
	b	0f
1:	tlbi	vmalle1
	dsb	sy
	isb
0:
	ret
ENDPROC(__asm_invalidate_tlb_all)
.popsection
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-07 06:58:06 +09:00			`/* SPDX-License-Identifier: GPL-2.0+ */`
arm64: core support Relocation code based on a patch by Scott Wood, which is: Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Feng <fenghua@phytium.com.cn> 2013-12-14 12:47:35 +09:00			`/*`
			`* (C) Copyright 2013`
			`* David Feng <fenghua@phytium.com.cn>`
			`*/`

			`#include <asm-offsets.h>`
			`#include <config.h>`
			`#include <linux/linkage.h>`
			`#include <asm/macro.h>`

			`/*`
			`* void __asm_invalidate_tlb_all(void)`
			`*`
			`* invalidate all tlb entries.`
armv8: move low-level assembly functions into function-sections TPL builds today don't need to call into firmware or set up the MMU (if this changes, it should be controlled through a config option whether to include this or not), but include the needed support code for this anyway. By moving these unused low-level functions into seperate function-sections, the linker can garbage-collect the unused sections. Note that (if DM support is enabled), there will be a call to the cache-flushing code from alloc_priv(...) in drivers/core/device.c. This then add 52 bytes of binary size (an increase from 20589 to 20641 bytes) compared to completely removing this code. Even for a feature-rich TPL (including DM support as for the RK3368), this equates to a size difference of significantly more than 10% in TPL binary size. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Simon Glass <sjg@chromium.org> 2017-07-04 17:04:54 +09:00			`*/`
			`.pushsection .text.__asm_invalidate_tlb_all, "ax"`
arm64: core support Relocation code based on a patch by Scott Wood, which is: Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Feng <fenghua@phytium.com.cn> 2013-12-14 12:47:35 +09:00			`ENTRY(__asm_invalidate_tlb_all)`
			`switch_el x9, 3f, 2f, 1f`
			`3: tlbi alle3`
			`dsb sy`
			`isb`
			`b 0f`
			`2: tlbi alle2`
			`dsb sy`
			`isb`
			`b 0f`
			`1: tlbi vmalle1`
			`dsb sy`
			`isb`
			`0:`
			`ret`
			`ENDPROC(__asm_invalidate_tlb_all)`
armv8: move low-level assembly functions into function-sections TPL builds today don't need to call into firmware or set up the MMU (if this changes, it should be controlled through a config option whether to include this or not), but include the needed support code for this anyway. By moving these unused low-level functions into seperate function-sections, the linker can garbage-collect the unused sections. Note that (if DM support is enabled), there will be a call to the cache-flushing code from alloc_priv(...) in drivers/core/device.c. This then add 52 bytes of binary size (an increase from 20589 to 20641 bytes) compared to completely removing this code. Even for a feature-rich TPL (including DM support as for the RK3368), this equates to a size difference of significantly more than 10% in TPL binary size. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Simon Glass <sjg@chromium.org> 2017-07-04 17:04:54 +09:00			`.popsection`