Commit c63d9f82 authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
Browse files

arm64: head.S: Convert to modern annotations for assembly functions 



In an effort to clarify and simplify the annotation of assembly functions
in the kernel new macros have been introduced. These replace ENTRY and
ENDPROC and also add a new annotation for static functions which previously
had no ENTRY equivalent. Update the annotations in the core kernel code to
the new macros.

Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 1e4729ed

arch/arm64/kernel/head.S

+28 −28
Original line number Diff line number Diff line
@@ -275,7 +275,7 @@ ENDPROC(preserve_boot_args) 
 *   - first few MB of the kernel linear mapping to jump to once the MMU has

 *     been enabled

 */

__create_page_tables:

SYM_FUNC_START_LOCAL(__create_page_tables)

	mov	x28, lr



	/*
@@ -403,7 +403,7 @@ __create_page_tables: 
	bl	__inval_dcache_area



	ret	x28

ENDPROC(__create_page_tables)

SYM_FUNC_END(__create_page_tables)

	.ltorg



/*
@@ -411,7 +411,7 @@ ENDPROC(__create_page_tables) 
 *

 *   x0 = __PHYS_OFFSET

 */

__primary_switched:

SYM_FUNC_START_LOCAL(__primary_switched)

	adrp	x4, init_thread_union

	add	sp, x4, #THREAD_SIZE

	adr_l	x5, init_task
@@ -456,7 +456,7 @@ __primary_switched: 
	mov	x29, #0

	mov	x30, #0

	b	start_kernel

ENDPROC(__primary_switched)

SYM_FUNC_END(__primary_switched)



/*

 * end early head section, begin head code that is also used for
@@ -475,7 +475,7 @@ EXPORT_SYMBOL(kimage_vaddr) 
 * Returns either BOOT_CPU_MODE_EL1 or BOOT_CPU_MODE_EL2 in w0 if

 * booted in EL1 or EL2 respectively.

 */

ENTRY(el2_setup)

SYM_FUNC_START(el2_setup)

	msr	SPsel, #1			// We want to use SP_EL{1,2}

	mrs	x0, CurrentEL

	cmp	x0, #CurrentEL_EL2
@@ -636,13 +636,13 @@ install_el2_stub: 
	msr	elr_el2, lr

	mov	w0, #BOOT_CPU_MODE_EL2		// This CPU booted in EL2

	eret

ENDPROC(el2_setup)

SYM_FUNC_END(el2_setup)



/*

 * Sets the __boot_cpu_mode flag depending on the CPU boot mode passed

 * in w0. See arch/arm64/include/asm/virt.h for more info.

 */

set_cpu_boot_mode_flag:

SYM_FUNC_START_LOCAL(set_cpu_boot_mode_flag)

	adr_l	x1, __boot_cpu_mode

	cmp	w0, #BOOT_CPU_MODE_EL2

	b.ne	1f
@@ -651,7 +651,7 @@ set_cpu_boot_mode_flag: 
	dmb	sy

	dc	ivac, x1			// Invalidate potentially stale cache line

	ret

ENDPROC(set_cpu_boot_mode_flag)

SYM_FUNC_END(set_cpu_boot_mode_flag)



/*

 * These values are written with the MMU off, but read with the MMU on.
@@ -683,7 +683,7 @@ ENTRY(__early_cpu_boot_status) 
	 * This provides a "holding pen" for platforms to hold all secondary

	 * cores are held until we're ready for them to initialise.

	 */

ENTRY(secondary_holding_pen)

SYM_FUNC_START(secondary_holding_pen)

	bl	el2_setup			// Drop to EL1, w0=cpu_boot_mode

	bl	set_cpu_boot_mode_flag

	mrs	x0, mpidr_el1
@@ -695,19 +695,19 @@ pen: ldr x4, [x3] 
	b.eq	secondary_startup

	wfe

	b	pen

ENDPROC(secondary_holding_pen)

SYM_FUNC_END(secondary_holding_pen)



	/*

	 * Secondary entry point that jumps straight into the kernel. Only to

	 * be used where CPUs are brought online dynamically by the kernel.

	 */

ENTRY(secondary_entry)

SYM_FUNC_START(secondary_entry)

	bl	el2_setup			// Drop to EL1

	bl	set_cpu_boot_mode_flag

	b	secondary_startup

ENDPROC(secondary_entry)

SYM_FUNC_END(secondary_entry)



secondary_startup:

SYM_FUNC_START_LOCAL(secondary_startup)

	/*

	 * Common entry point for secondary CPUs.

	 */
@@ -717,9 +717,9 @@ secondary_startup: 
	bl	__enable_mmu

	ldr	x8, =__secondary_switched

	br	x8

ENDPROC(secondary_startup)

SYM_FUNC_END(secondary_startup)



__secondary_switched:

SYM_FUNC_START_LOCAL(__secondary_switched)

	adr_l	x5, vectors

	msr	vbar_el1, x5

	isb
@@ -734,13 +734,13 @@ __secondary_switched: 
	mov	x29, #0

	mov	x30, #0

	b	secondary_start_kernel

ENDPROC(__secondary_switched)

SYM_FUNC_END(__secondary_switched)



__secondary_too_slow:

SYM_FUNC_START_LOCAL(__secondary_too_slow)

	wfe

	wfi

	b	__secondary_too_slow

ENDPROC(__secondary_too_slow)

SYM_FUNC_END(__secondary_too_slow)



/*

 * The booting CPU updates the failed status @__early_cpu_boot_status,
@@ -772,7 +772,7 @@ ENDPROC(__secondary_too_slow) 
 * Checks if the selected granule size is supported by the CPU.

 * If it isn't, park the CPU

 */

ENTRY(__enable_mmu)

SYM_FUNC_START(__enable_mmu)

	mrs	x2, ID_AA64MMFR0_EL1

	ubfx	x2, x2, #ID_AA64MMFR0_TGRAN_SHIFT, 4

	cmp	x2, #ID_AA64MMFR0_TGRAN_SUPPORTED
@@ -796,9 +796,9 @@ ENTRY(__enable_mmu) 
	dsb	nsh

	isb

	ret

ENDPROC(__enable_mmu)

SYM_FUNC_END(__enable_mmu)



ENTRY(__cpu_secondary_check52bitva)

SYM_FUNC_START(__cpu_secondary_check52bitva)

#ifdef CONFIG_ARM64_VA_BITS_52

	ldr_l	x0, vabits_actual

	cmp	x0, #52
@@ -816,9 +816,9 @@ ENTRY(__cpu_secondary_check52bitva) 


#endif

2:	ret

ENDPROC(__cpu_secondary_check52bitva)

SYM_FUNC_END(__cpu_secondary_check52bitva)



__no_granule_support:

SYM_FUNC_START_LOCAL(__no_granule_support)

	/* Indicate that this CPU can't boot and is stuck in the kernel */

	update_early_cpu_boot_status \

		CPU_STUCK_IN_KERNEL | CPU_STUCK_REASON_NO_GRAN, x1, x2
@@ -826,10 +826,10 @@ __no_granule_support: 
	wfe

	wfi

	b	1b

ENDPROC(__no_granule_support)

SYM_FUNC_END(__no_granule_support)



#ifdef CONFIG_RELOCATABLE

__relocate_kernel:

SYM_FUNC_START_LOCAL(__relocate_kernel)

	/*

	 * Iterate over each entry in the relocation table, and apply the

	 * relocations in place.
@@ -931,10 +931,10 @@ __relocate_kernel: 
#endif

	ret



ENDPROC(__relocate_kernel)

SYM_FUNC_END(__relocate_kernel)

#endif



__primary_switch:

SYM_FUNC_START_LOCAL(__primary_switch)

#ifdef CONFIG_RANDOMIZE_BASE

	mov	x19, x0				// preserve new SCTLR_EL1 value

	mrs	x20, sctlr_el1			// preserve old SCTLR_EL1 value
@@ -977,4 +977,4 @@ __primary_switch: 
	ldr	x8, =__primary_switched

	adrp	x0, __PHYS_OFFSET

	br	x8

ENDPROC(__primary_switch)
 
SYM_FUNC_END(__primary_switch)

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