From: Will Deacon <will.deacon@arm.com>
Date: Wed, 12 Jan 2011 17:10:45 +0000 (+0000)
Subject: ARM: proc: add proc info for Cortex-A15MP using classic page tables
X-Git-Tag: v3.1-rc1~258^2^2~3^2~5
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7665d9d2df2eb26284467c2f8591004bd511c75f;p=linux.git

ARM: proc: add proc info for Cortex-A15MP using classic page tables

Multicore implementations of the Cortex-A15 require bit 6 of the
auxiliary control register to be set in order for cache and TLB
maintenance operations to be broadcast between CPUs.

This patch adds a new proc_info structure for Cortex-A15, which enables
the SMP bit during setup and includes the new HWCAP for integer
division.

Signed-off-by: Will Deacon <will.deacon@arm.com>
---

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 3185da27a537..593285419e75 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -280,12 +280,18 @@ cpu_resume_l1_flags:
  */
 __v7_ca5mp_setup:
 __v7_ca9mp_setup:
+	mov	r10, #(1 << 0)			@ TLB ops broadcasting
+	b	1f
+__v7_ca15mp_setup:
+	mov	r10, #0
+1:
 #ifdef CONFIG_SMP
 	ALT_SMP(mrc	p15, 0, r0, c1, c0, 1)
 	ALT_UP(mov	r0, #(1 << 6))		@ fake it for UP
 	tst	r0, #(1 << 6)			@ SMP/nAMP mode enabled?
-	orreq	r0, r0, #(1 << 6) | (1 << 0)	@ Enable SMP/nAMP mode and
-	mcreq	p15, 0, r0, c1, c0, 1		@ TLB ops broadcasting
+	orreq	r0, r0, #(1 << 6)		@ Enable SMP/nAMP mode
+	orreq	r0, r0, r10			@ Enable CPU-specific SMP bits
+	mcreq	p15, 0, r0, c1, c0, 1
 #endif
 __v7_setup:
 	adr	r12, __v7_setup_stack		@ the local stack
@@ -464,6 +470,16 @@ __v7_ca9mp_proc_info:
 	__v7_proc __v7_ca9mp_setup
 	.size	__v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info
 
+	/*
+	 * ARM Ltd. Cortex A15 processor.
+	 */
+	.type	__v7_ca15mp_proc_info, #object
+__v7_ca15mp_proc_info:
+	.long	0x410fc0f0
+	.long	0xff0ffff0
+	__v7_proc __v7_ca15mp_setup, hwcaps = HWCAP_IDIV
+	.size	__v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
+
 	/*
 	 * Match any ARMv7 processor core.
 	 */