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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 04/28] ARM: mmu: Introduce set_ttbr()
Date: Tue,  8 May 2018 14:29:27 -0700	[thread overview]
Message-ID: <20180508212951.6446-5-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20180508212951.6446-1-andrew.smirnov@gmail.com>

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/cpu/mmu-early.c | 3 +--
 arch/arm/cpu/mmu.c       | 3 +--
 arch/arm/cpu/mmu.h       | 5 +++++
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/arm/cpu/mmu-early.c b/arch/arm/cpu/mmu-early.c
index fc14d5cac..79fc3080a 100644
--- a/arch/arm/cpu/mmu-early.c
+++ b/arch/arm/cpu/mmu-early.c
@@ -39,8 +39,7 @@ void mmu_early_enable(unsigned long membase, unsigned long memsize,
 
 	arm_set_cache_functions();
 
-	/* Set the ttb register */
-	asm volatile ("mcr  p15,0,%0,c2,c0,0" : : "r"(ttb) /*:*/);
+	set_ttbr(ttb);
 
 	/* Set the Domain Access Control Register */
 	i = 0x3;
diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c
index c70e9e782..28732b795 100644
--- a/arch/arm/cpu/mmu.c
+++ b/arch/arm/cpu/mmu.c
@@ -471,8 +471,7 @@ static int mmu_init(void)
 
 	pr_debug("ttb: 0x%p\n", ttb);
 
-	/* Set the ttb register */
-	asm volatile ("mcr  p15,0,%0,c2,c0,0" : : "r"(ttb) /*:*/);
+	set_ttbr(ttb);
 
 	/* Set the Domain Access Control Register */
 	i = 0x3;
diff --git a/arch/arm/cpu/mmu.h b/arch/arm/cpu/mmu.h
index 79ebc80d7..5dcf4b53a 100644
--- a/arch/arm/cpu/mmu.h
+++ b/arch/arm/cpu/mmu.h
@@ -11,4 +11,9 @@ static inline void __mmu_cache_off(void) {}
 static inline void __mmu_cache_flush(void) {}
 #endif
 
+static inline void set_ttbr(void *ttb)
+{
+	asm volatile ("mcr  p15,0,%0,c2,c0,0" : : "r"(ttb) /*:*/);
+}
+
 #endif /* __ARM_MMU_H */
-- 
2.17.0


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  parent reply	other threads:[~2018-05-08 21:30 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-08 21:29 [PATCH 00/28] ARM MMU code improvements and on-demand PTE allocation Andrey Smirnov
2018-05-08 21:29 ` [PATCH 01/28] ARM: mmu: Remove unused ARM_VECTORS_SIZE Andrey Smirnov
2018-05-08 21:29 ` [PATCH 02/28] ARM: mmu: Make use of IS_ALIGNED in arm_mmu_remap_sdram() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 03/28] ARM: mmu: Use ALIGN and ALIGN_DOWN in map_cachable() Andrey Smirnov
2018-05-08 21:29 ` Andrey Smirnov [this message]
2018-05-08 21:29 ` [PATCH 05/28] ARM: mmu: Introduce set_domain() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 06/28] ARM: mmu: Share code for create_sections() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 07/28] ARM: mmu: Separate index and address in create_sections() Andrey Smirnov
2018-05-14  6:47   ` Sascha Hauer
2018-05-15  5:41     ` Andrey Smirnov
2018-05-08 21:29 ` [PATCH 08/28] sizes.h: Sync with Linux 4.16 Andrey Smirnov
2018-05-08 21:29 ` [PATCH 09/28] ARM: mmu: Specify size in bytes in create_sections() Andrey Smirnov
2018-05-14  6:52   ` Sascha Hauer
2018-05-15  5:42     ` Andrey Smirnov
2018-05-08 21:29 ` [PATCH 10/28] ARM: mmu: Share code for initial flat mapping creation Andrey Smirnov
2018-05-08 21:29 ` [PATCH 11/28] ARM: mmu: Share PMD_SECT_DEF_CACHED Andrey Smirnov
2018-05-08 21:29 ` [PATCH 12/28] ARM: mmu: Drop needless shifting in map_io_sections() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 13/28] ARM: mmu: Replace hardcoded shifts with pgd_index() from Linux Andrey Smirnov
2018-05-08 21:29 ` [PATCH 14/28] ARM: mmu: Trivial simplification in arm_mmu_remap_sdram() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 15/28] ARM: mmu: Replace various SZ_1M with PGDIR_SIZE Andrey Smirnov
2018-05-08 21:29 ` [PATCH 16/28] ARM: mmu: Use PAGE_SIZE when specifying size of one page Andrey Smirnov
2018-05-08 21:29 ` [PATCH 17/28] ARM: mmu: Define and use PTRS_PER_PTE Andrey Smirnov
2018-05-08 21:29 ` [PATCH 18/28] ARM: mmu: Use PAGE_SIZE instead of magic right shift by 12 Andrey Smirnov
2018-05-08 21:29 ` [PATCH 19/28] ARM: mmu: Use xmemalign in arm_create_pte() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 20/28] ARM: mmu: Use xmemalign in mmu_init() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 21/28] ARM: mmu: Share code between dma_alloc_*() functions Andrey Smirnov
2018-05-08 21:29 ` [PATCH 22/28] ARM: mmu: Pass PTE flags a parameter to arm_create_pte() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 23/28] ARM: mmu: Make sure that address is 1M aligned in arm_create_pte() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 24/28] ARM: mmu: Use find_pte() to find PTE in create_vector_table() Andrey Smirnov
2018-05-08 21:29 ` [PATCH 25/28] ARM: mmu: Use dma_inv_range() in dma_sync_single_for_cpu() Andrey Smirnov
2018-05-09  8:49   ` Lucas Stach
2018-05-08 21:29 ` [PATCH 26/28] ARM: mmu: Simplify the use of dma_flush_range() Andrey Smirnov
2018-05-09  8:48   ` Lucas Stach
2018-05-14 23:37     ` Andrey Smirnov
2018-05-08 21:29 ` [PATCH 27/28] ARM: mmu: Implement on-demand PTE allocation Andrey Smirnov
2018-05-08 21:29 ` [PATCH 28/28] ARM: mmu: Introduce ARM_TTB_SIZE Andrey Smirnov
2018-05-14  7:06 ` [PATCH 00/28] ARM MMU code improvements and on-demand PTE allocation Sascha Hauer

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