linux-kernel - [PATCH v5 15/19] ARM: LPAE: Add support for cpu_v7_do

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Date:	Sun,  8 May 2011 13:51:34 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>
Subject: [PATCH v5 15/19] ARM: LPAE: Add support for cpu_v7_do_(suspend|resume)

With LPAE, the TTBRx size is 64-bit so make sure that all the
information is saved and restored.

Signed-off-by: Catalin Marinas <catalin.marinas@....com>
---
 arch/arm/mm/proc-v7.S |   22 ++++++++++++++++++++++
 1 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index ad22628..3e6999e 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -260,19 +260,32 @@ cpu_v7_name:
 
 /* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */
 .globl	cpu_v7_suspend_size
+#ifdef CONFIG_ARM_LPAE
+.equ	cpu_v7_suspend_size, 4 * 10
+#else
 .equ	cpu_v7_suspend_size, 4 * 8
+#endif
 #ifdef CONFIG_PM_SLEEP
 ENTRY(cpu_v7_do_suspend)
 	stmfd	sp!, {r4 - r11, lr}
 	mrc	p15, 0, r4, c13, c0, 0	@ FCSE/PID
 	mrc	p15, 0, r5, c13, c0, 1	@ Context ID
 	mrc	p15, 0, r6, c3, c0, 0	@ Domain ID
+#ifdef CONFIG_ARM_LPAE
+	mrrc	p15, 0, r7, r8, c2	@ TTB 0
+	mrrc	p15, 1, r2, r3, c2	@ TTB 1
+#else
 	mrc	p15, 0, r7, c2, c0, 0	@ TTB 0
 	mrc	p15, 0, r8, c2, c0, 1	@ TTB 1
+#endif
 	mrc	p15, 0, r9, c1, c0, 0	@ Control register
 	mrc	p15, 0, r10, c1, c0, 1	@ Auxiliary control register
 	mrc	p15, 0, r11, c1, c0, 2	@ Co-processor access control
+#ifdef CONFIG_ARM_LPAE
+	stmia	r0, {r2 - r11}
+#else
 	stmia	r0, {r4 - r11}
+#endif
 	ldmfd	sp!, {r4 - r11, pc}
 ENDPROC(cpu_v7_do_suspend)
 
@@ -280,12 +293,21 @@ ENTRY(cpu_v7_do_resume)
 	mov	ip, #0
 	mcr	p15, 0, ip, c8, c7, 0	@ invalidate TLBs
 	mcr	p15, 0, ip, c7, c5, 0	@ invalidate I cache
+#ifdef CONFIG_ARM_LPAE
+	ldmia	r0, {r2 - r11}
+#else
 	ldmia	r0, {r4 - r11}
+#endif
 	mcr	p15, 0, r4, c13, c0, 0	@ FCSE/PID
 	mcr	p15, 0, r5, c13, c0, 1	@ Context ID
 	mcr	p15, 0, r6, c3, c0, 0	@ Domain ID
+#ifdef CONFIG_ARM_LPAE
+	mcrr	p15, 0, r7, r8, c2	@ TTB 0
+	mcrr	p15, 1, r2, r3, c2	@ TTB 1
+#else
 	mcr	p15, 0, r7, c2, c0, 0	@ TTB 0
 	mcr	p15, 0, r8, c2, c0, 1	@ TTB 1
+#endif
 	mcr	p15, 0, ip, c2, c0, 2	@ TTB control register
 	mcr	p15, 0, r10, c1, c0, 1	@ Auxiliary control register
 	mcr	p15, 0, r11, c1, c0, 2	@ Co-processor access control

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