Remove unused or invalid asm helper functions

There are a small number of non-EL specific helper functions
which are no longer used, and also some unusable helper
functions for non-existant registers.

This change removes all of these functions.

Change-Id: Idd656cef3b59cf5c46fe2be4029d72288b649c24

include/lib/aarch64/arch_helpers.h

@@ -194,9 +194,7 @@ extern unsigned long read_ttbr0_el1(void);
 extern unsigned long read_ttbr0_el2(void);
 extern unsigned long read_ttbr0_el3(void);
 
-extern unsigned long read_ttbr1(void);
 extern unsigned long read_ttbr1_el1(void);
-extern unsigned long read_ttbr1_el2(void);
 
 extern unsigned long read_cptr_el2(void);
 extern unsigned long read_cptr_el3(void);
@@ -228,12 +226,10 @@ extern void write_esr_el1(unsigned long);
 extern void write_esr_el2(unsigned long);
 extern void write_esr_el3(unsigned long);
 
-extern void write_afsr0(unsigned long);
 extern void write_afsr0_el1(unsigned long);
 extern void write_afsr0_el2(unsigned long);
 extern void write_afsr0_el3(unsigned long);
 
-extern void write_afsr1(unsigned long);
 extern void write_afsr1_el1(unsigned long);
 extern void write_afsr1_el2(unsigned long);
 extern void write_afsr1_el3(unsigned long);
@@ -263,7 +259,6 @@ extern void write_ttbr0_el2(unsigned long);
 extern void write_ttbr0_el3(unsigned long);
 
 extern void write_ttbr1_el1(unsigned long);
-extern void write_ttbr1_el2(unsigned long);
 
 extern void write_cpuectlr(unsigned long);
 extern void write_cptr_el2(unsigned long);

lib/aarch64/misc_helpers.S

@@ -46,22 +46,18 @@
 	.globl	read_daif
 	.globl	write_daif
 
-	.globl	read_spsr
 	.globl	read_spsr_el1
 	.globl	read_spsr_el2
 	.globl	read_spsr_el3
 
-	.globl	write_spsr
 	.globl	write_spsr_el1
 	.globl	write_spsr_el2
 	.globl	write_spsr_el3
 
-	.globl	read_elr
 	.globl	read_elr_el1
 	.globl	read_elr_el2
 	.globl	read_elr_el3
 
-	.globl	write_elr
 	.globl	write_elr_el1
 	.globl	write_elr_el2
 	.globl	write_elr_el3
@@ -153,16 +149,6 @@ func write_daif
 	ret
 
 
-func read_spsr
-	mrs	x0, CurrentEl
-	cmp	x0, #(MODE_EL1 << MODE_EL_SHIFT)
-	b.eq	read_spsr_el1
-	cmp	x0, #(MODE_EL2 << MODE_EL_SHIFT)
-	b.eq	read_spsr_el2
-	cmp	x0, #(MODE_EL3 << MODE_EL_SHIFT)
-	b.eq	read_spsr_el3
-
-
 func read_spsr_el1
 	mrs	x0, spsr_el1
 	ret
@@ -178,16 +164,6 @@ func read_spsr_el3
 	ret
 
 
-func write_spsr
-	mrs	x1, CurrentEl
-	cmp	x1, #(MODE_EL1 << MODE_EL_SHIFT)
-	b.eq	write_spsr_el1
-	cmp	x1, #(MODE_EL2 << MODE_EL_SHIFT)
-	b.eq	write_spsr_el2
-	cmp	x1, #(MODE_EL3 << MODE_EL_SHIFT)
-	b.eq	write_spsr_el3
-
-
 func write_spsr_el1
 	msr	spsr_el1, x0
 	ret
@@ -203,16 +179,6 @@ func write_spsr_el3
 	ret
 
 
-func read_elr
-	mrs	x0, CurrentEl
-	cmp	x0, #(MODE_EL1 << MODE_EL_SHIFT)
-	b.eq	read_elr_el1
-	cmp	x0, #(MODE_EL2 << MODE_EL_SHIFT)
-	b.eq	read_elr_el2
-	cmp	x0, #(MODE_EL3 << MODE_EL_SHIFT)
-	b.eq	read_elr_el3
-
-
 func read_elr_el1
 	mrs	x0, elr_el1
 	ret
@@ -228,16 +194,6 @@ func read_elr_el3
 	ret
 
 
-func write_elr
-	mrs	x1, CurrentEl
-	cmp	x1, #(MODE_EL1 << MODE_EL_SHIFT)
-	b.eq	write_elr_el1
-	cmp	x1, #(MODE_EL2 << MODE_EL_SHIFT)
-	b.eq	write_elr_el2
-	cmp	x1, #(MODE_EL3 << MODE_EL_SHIFT)
-	b.eq	write_elr_el3
-
-
 func write_elr_el1
 	msr	elr_el1, x0
 	ret

lib/aarch64/sysreg_helpers.S

@@ -125,10 +125,7 @@
 	.globl	write_ttbr0_el3
 
 	.globl	read_ttbr1_el1
-	.globl	read_ttbr1_el2
-	.globl	write_ttbr1
 	.globl	write_ttbr1_el1
-	.globl	write_ttbr1_el2
 
 	.globl	read_cpacr
 	.globl	write_cpacr
@@ -160,8 +157,6 @@
 
 #if SUPPORT_VFP
 	.globl	enable_vfp
-	.globl	read_fpexc
-	.globl	write_fpexc
 #endif
 
 
@@ -577,11 +572,6 @@ func write_tcr_el3
 	 * CPTR accessors
 	 * -----------------------------------------------------
 	 */
-func read_cptr_el1
-	b	read_cptr_el1
-	ret
-
-
 func read_cptr_el2
 	mrs	x0, cptr_el2
 	ret
@@ -592,10 +582,6 @@ func read_cptr_el3
 	ret
 
 
-func write_cptr_el1
-	b	write_cptr_el1
-
-
 func write_cptr_el2
 	msr	cptr_el2, x0
 	ret
@@ -649,27 +635,11 @@ func read_ttbr1_el1
 	ret
 
 
-func read_ttbr1_el2
-	b	read_ttbr1_el2
-
-
-func read_ttbr1_el3
-	b	read_ttbr1_el3
-
-
 func write_ttbr1_el1
 	msr	ttbr1_el1, x0
 	ret
 
 
-func write_ttbr1_el2
-	b	write_ttbr1_el2
-
-
-func write_ttbr1_el3
-	b	write_ttbr1_el3
-
-
 func read_hcr
 	mrs	x0, hcr_el2
 	ret
@@ -762,14 +732,4 @@ func enable_vfp
 	isb
 	ret
 
-
-func read_fpexc
-	b	read_fpexc
-	ret
-
-
-func write_fpexc
-	b	write_fpexc
-	ret
-
 #endif