ARM: 6466/1: implement flush_icache_all for the rest of the CPUs

Commit 81d11955bf0 ("ARM: 6405/1: Handle __flush_icache_all for
CONFIG_SMP_ON_UP") added a new function to struct cpu_cache_fns:
flush_icache_all(). It also implemented this for v6 and v7 but not
for v5 and backwards. Without the function pointer in place, we
will be calling wrong cache functions.

For example with ep93xx we get following:

    Unable to handle kernel paging request at virtual address ee070f38
    pgd = c0004000
    [ee070f38] *pgd=00000000
    Internal error: Oops: 80000005 [#1] PREEMPT
    last sysfs file:
    Modules linked in:
    CPU: 0    Not tainted  (2.6.36+ #1)
    PC is at 0xee070f38
    LR is at __dma_alloc+0x11c/0x2d0
    pc : [<ee070f38>]    lr : [<c0032c8c>]    psr: 60000013
    sp : c581bde0  ip : 00000000  fp : c0472000
    r10: c0472000  r9 : 000000d0  r8 : 00020000
    r7 : 0001ffff  r6 : 00000000  r5 : c0472400  r4 : c5980000
    r3 : c03ab7e0  r2 : 00000000  r1 : c59a0000  r0 : c5980000
    Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
    Control: c000717f  Table: c0004000  DAC: 00000017
    Process swapper (pid: 1, stack limit = 0xc581a270)
    [<c0032c8c>] (__dma_alloc+0x11c/0x2d0)
    [<c0032e5c>] (dma_alloc_writecombine+0x1c/0x24)
    [<c0204148>] (ep93xx_pcm_preallocate_dma_buffer+0x44/0x60)
    [<c02041c0>] (ep93xx_pcm_new+0x5c/0x88)
    [<c01ff188>] (snd_soc_instantiate_cards+0x8a8/0xbc0)
    [<c01ff59c>] (soc_probe+0xfc/0x134)
    [<c01adafc>] (platform_drv_probe+0x18/0x1c)
    [<c01acca4>] (driver_probe_device+0xb0/0x16c)
    [<c01ac284>] (bus_for_each_drv+0x48/0x84)
    [<c01ace90>] (device_attach+0x50/0x68)
    [<c01ac0f8>] (bus_probe_device+0x24/0x44)
    [<c01aad7c>] (device_add+0x2fc/0x44c)
    [<c01adfa8>] (platform_device_add+0x104/0x15c)
    [<c0015eb8>] (simone_init+0x60/0x94)
    [<c0021410>] (do_one_initcall+0xd0/0x1a4)

__dma_alloc() calls (inlined) __dma_alloc_buffer() which ends up
calling dmac_flush_range(). Now since the entries in the
arm920_cache_fns are shifted by one, we jump into address 0xee070f38
which is actually next instruction after the arm920_cache_fns
structure.

So implement flush_icache_all() for the rest of the supported CPUs
using a generic 'invalidate I cache' instruction.

Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/cache-fa.S

@@ -37,6 +37,17 @@
 /* FIXME: put optimal value here. Current one is just estimation */
 #define CACHE_DLIMIT	(CACHE_DSIZE * 2)
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(fa_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(fa_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -233,6 +244,7 @@ ENDPROC(fa_dma_unmap_area)
 
 	.type	fa_cache_fns, #object
 ENTRY(fa_cache_fns)
+	.long	fa_flush_icache_all
 	.long	fa_flush_kern_cache_all
 	.long	fa_flush_user_cache_all
 	.long	fa_flush_user_cache_range

arch/arm/mm/cache-v3.S

@@ -12,6 +12,15 @@
 #include <asm/page.h>
 #include "proc-macros.S"
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(v3_flush_icache_all)
+	mov	pc, lr
+ENDPROC(v3_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -122,6 +131,7 @@ ENDPROC(v3_dma_map_area)
 
 	.type	v3_cache_fns, #object
 ENTRY(v3_cache_fns)
+	.long	v3_flush_icache_all
 	.long	v3_flush_kern_cache_all
 	.long	v3_flush_user_cache_all
 	.long	v3_flush_user_cache_range

arch/arm/mm/cache-v4.S

@@ -12,6 +12,15 @@
 #include <asm/page.h>
 #include "proc-macros.S"
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(v4_flush_icache_all)
+	mov	pc, lr
+ENDPROC(v4_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -134,6 +143,7 @@ ENDPROC(v4_dma_map_area)
 
 	.type	v4_cache_fns, #object
 ENTRY(v4_cache_fns)
+	.long	v4_flush_icache_all
 	.long	v4_flush_kern_cache_all
 	.long	v4_flush_user_cache_all
 	.long	v4_flush_user_cache_range

arch/arm/mm/cache-v4wb.S

@@ -50,6 +50,17 @@ flush_base:
 	.long	FLUSH_BASE
 	.text
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(v4wb_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(v4wb_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -244,6 +255,7 @@ ENDPROC(v4wb_dma_unmap_area)
 
 	.type	v4wb_cache_fns, #object
 ENTRY(v4wb_cache_fns)
+	.long	v4wb_flush_icache_all
 	.long	v4wb_flush_kern_cache_all
 	.long	v4wb_flush_user_cache_all
 	.long	v4wb_flush_user_cache_range

arch/arm/mm/cache-v4wt.S

@@ -40,6 +40,17 @@
  */
 #define CACHE_DLIMIT	16384
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(v4wt_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(v4wt_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -188,6 +199,7 @@ ENDPROC(v4wt_dma_map_area)
 
 	.type	v4wt_cache_fns, #object
 ENTRY(v4wt_cache_fns)
+	.long	v4wt_flush_icache_all
 	.long	v4wt_flush_kern_cache_all
 	.long	v4wt_flush_user_cache_all
 	.long	v4wt_flush_user_cache_range

arch/arm/mm/proc-arm1020.S

@@ -119,6 +119,20 @@ ENTRY(cpu_arm1020_do_idle)
 /* ================================= CACHE ================================ */
 
 	.align	5
+
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm1020_flush_icache_all)
+#ifndef CONFIG_CPU_ICACHE_DISABLE
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+#endif
+	mov	pc, lr
+ENDPROC(arm1020_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -351,6 +365,7 @@ ENTRY(arm1020_dma_unmap_area)
 ENDPROC(arm1020_dma_unmap_area)
 
 ENTRY(arm1020_cache_fns)
+	.long	arm1020_flush_icache_all
 	.long	arm1020_flush_kern_cache_all
 	.long	arm1020_flush_user_cache_all
 	.long	arm1020_flush_user_cache_range

arch/arm/mm/proc-arm1020e.S

@@ -119,6 +119,20 @@ ENTRY(cpu_arm1020e_do_idle)
 /* ================================= CACHE ================================ */
 
 	.align	5
+
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm1020e_flush_icache_all)
+#ifndef CONFIG_CPU_ICACHE_DISABLE
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+#endif
+	mov	pc, lr
+ENDPROC(arm1020e_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -337,6 +351,7 @@ ENTRY(arm1020e_dma_unmap_area)
 ENDPROC(arm1020e_dma_unmap_area)
 
 ENTRY(arm1020e_cache_fns)
+	.long	arm1020e_flush_icache_all
 	.long	arm1020e_flush_kern_cache_all
 	.long	arm1020e_flush_user_cache_all
 	.long	arm1020e_flush_user_cache_range

arch/arm/mm/proc-arm1022.S

@@ -108,6 +108,20 @@ ENTRY(cpu_arm1022_do_idle)
 /* ================================= CACHE ================================ */
 
 	.align	5
+
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm1022_flush_icache_all)
+#ifndef CONFIG_CPU_ICACHE_DISABLE
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+#endif
+	mov	pc, lr
+ENDPROC(arm1022_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -326,6 +340,7 @@ ENTRY(arm1022_dma_unmap_area)
 ENDPROC(arm1022_dma_unmap_area)
 
 ENTRY(arm1022_cache_fns)
+	.long	arm1022_flush_icache_all
 	.long	arm1022_flush_kern_cache_all
 	.long	arm1022_flush_user_cache_all
 	.long	arm1022_flush_user_cache_range

arch/arm/mm/proc-arm1026.S

@@ -108,6 +108,20 @@ ENTRY(cpu_arm1026_do_idle)
 /* ================================= CACHE ================================ */
 
 	.align	5
+
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm1026_flush_icache_all)
+#ifndef CONFIG_CPU_ICACHE_DISABLE
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+#endif
+	mov	pc, lr
+ENDPROC(arm1026_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -320,6 +334,7 @@ ENTRY(arm1026_dma_unmap_area)
 ENDPROC(arm1026_dma_unmap_area)
 
 ENTRY(arm1026_cache_fns)
+	.long	arm1026_flush_icache_all
 	.long	arm1026_flush_kern_cache_all
 	.long	arm1026_flush_user_cache_all
 	.long	arm1026_flush_user_cache_range

arch/arm/mm/proc-arm920.S

@@ -109,6 +109,17 @@ ENTRY(cpu_arm920_do_idle)
 
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm920_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(arm920_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -305,6 +316,7 @@ ENTRY(arm920_dma_unmap_area)
 ENDPROC(arm920_dma_unmap_area)
 
 ENTRY(arm920_cache_fns)
+	.long	arm920_flush_icache_all
 	.long	arm920_flush_kern_cache_all
 	.long	arm920_flush_user_cache_all
 	.long	arm920_flush_user_cache_range

arch/arm/mm/proc-arm922.S

@@ -111,6 +111,17 @@ ENTRY(cpu_arm922_do_idle)
 
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm922_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(arm922_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -307,6 +318,7 @@ ENTRY(arm922_dma_unmap_area)
 ENDPROC(arm922_dma_unmap_area)
 
 ENTRY(arm922_cache_fns)
+	.long	arm922_flush_icache_all
 	.long	arm922_flush_kern_cache_all
 	.long	arm922_flush_user_cache_all
 	.long	arm922_flush_user_cache_range

arch/arm/mm/proc-arm925.S

@@ -144,6 +144,17 @@ ENTRY(cpu_arm925_do_idle)
 	mcr	p15, 0, r1, c1, c0, 0		@ Restore ICache enable
 	mov	pc, lr
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm925_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(arm925_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -362,6 +373,7 @@ ENTRY(arm925_dma_unmap_area)
 ENDPROC(arm925_dma_unmap_area)
 
 ENTRY(arm925_cache_fns)
+	.long	arm925_flush_icache_all
 	.long	arm925_flush_kern_cache_all
 	.long	arm925_flush_user_cache_all
 	.long	arm925_flush_user_cache_range

arch/arm/mm/proc-arm926.S

@@ -110,6 +110,17 @@ ENTRY(cpu_arm926_do_idle)
 	msr	cpsr_c, r3			@ Restore FIQ state
 	mov	pc, lr
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm926_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(arm926_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -325,6 +336,7 @@ ENTRY(arm926_dma_unmap_area)
 ENDPROC(arm926_dma_unmap_area)
 
 ENTRY(arm926_cache_fns)
+	.long	arm926_flush_icache_all
 	.long	arm926_flush_kern_cache_all
 	.long	arm926_flush_user_cache_all
 	.long	arm926_flush_user_cache_range

arch/arm/mm/proc-arm940.S

@@ -67,6 +67,17 @@ ENTRY(cpu_arm940_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	mov	pc, lr
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm940_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(arm940_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  */
@@ -254,6 +265,7 @@ ENTRY(arm940_dma_unmap_area)
 ENDPROC(arm940_dma_unmap_area)
 
 ENTRY(arm940_cache_fns)
+	.long	arm940_flush_icache_all
 	.long	arm940_flush_kern_cache_all
 	.long	arm940_flush_user_cache_all
 	.long	arm940_flush_user_cache_range

arch/arm/mm/proc-arm946.S

@@ -74,6 +74,17 @@ ENTRY(cpu_arm946_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	mov	pc, lr
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(arm946_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(arm946_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  */
@@ -296,6 +307,7 @@ ENTRY(arm946_dma_unmap_area)
 ENDPROC(arm946_dma_unmap_area)
 
 ENTRY(arm946_cache_fns)
+	.long	arm946_flush_icache_all
 	.long	arm946_flush_kern_cache_all
 	.long	arm946_flush_user_cache_all
 	.long	arm946_flush_user_cache_range

arch/arm/mm/proc-feroceon.S

@@ -123,6 +123,17 @@ ENTRY(cpu_feroceon_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	mov	pc, lr
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(feroceon_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(feroceon_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -401,6 +412,7 @@ ENTRY(feroceon_dma_unmap_area)
 ENDPROC(feroceon_dma_unmap_area)
 
 ENTRY(feroceon_cache_fns)
+	.long	feroceon_flush_icache_all
 	.long	feroceon_flush_kern_cache_all
 	.long	feroceon_flush_user_cache_all
 	.long	feroceon_flush_user_cache_range
@@ -412,6 +424,7 @@ ENTRY(feroceon_cache_fns)
 	.long	feroceon_dma_flush_range
 
 ENTRY(feroceon_range_cache_fns)
+	.long	feroceon_flush_icache_all
 	.long	feroceon_flush_kern_cache_all
 	.long	feroceon_flush_user_cache_all
 	.long	feroceon_flush_user_cache_range

arch/arm/mm/proc-xsc3.S

@@ -140,6 +140,17 @@ ENTRY(cpu_xsc3_do_idle)
 
 /* ================================= CACHE ================================ */
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(xsc3_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(xsc3_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -325,6 +336,7 @@ ENTRY(xsc3_dma_unmap_area)
 ENDPROC(xsc3_dma_unmap_area)
 
 ENTRY(xsc3_cache_fns)
+	.long	xsc3_flush_icache_all
 	.long	xsc3_flush_kern_cache_all
 	.long	xsc3_flush_user_cache_all
 	.long	xsc3_flush_user_cache_range

arch/arm/mm/proc-xscale.S

@@ -180,6 +180,17 @@ ENTRY(cpu_xscale_do_idle)
 
 /* ================================= CACHE ================================ */
 
+/*
+ *	flush_icache_all()
+ *
+ *	Unconditionally clean and invalidate the entire icache.
+ */
+ENTRY(xscale_flush_icache_all)
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mov	pc, lr
+ENDPROC(xscale_flush_icache_all)
+
 /*
  *	flush_user_cache_all()
  *
@@ -397,6 +408,7 @@ ENTRY(xscale_dma_unmap_area)
 ENDPROC(xscale_dma_unmap_area)
 
 ENTRY(xscale_cache_fns)
+	.long	xscale_flush_icache_all
 	.long	xscale_flush_kern_cache_all
 	.long	xscale_flush_user_cache_all
 	.long	xscale_flush_user_cache_range