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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 v4 10/29] ARM: mmu: Share code for initial flat mapping creation
Date: Mon, 21 May 2018 20:14:51 -0700	[thread overview]
Message-ID: <20180522031510.25505-11-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20180522031510.25505-1-andrew.smirnov@gmail.com>

Code creating inital 4GiB flat mapping is identical between mmu.c and
mmu-early.c, so move it to mmu.h and share.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/cpu/mmu-early.c | 4 +---
 arch/arm/cpu/mmu.c       | 6 +-----
 arch/arm/cpu/mmu.h       | 8 ++++++++
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/arch/arm/cpu/mmu-early.c b/arch/arm/cpu/mmu-early.c
index b10aa6fde..d9aafdd8a 100644
--- a/arch/arm/cpu/mmu-early.c
+++ b/arch/arm/cpu/mmu-early.c
@@ -5,7 +5,6 @@
 #include <asm/memory.h>
 #include <asm/system.h>
 #include <asm/cache.h>
-#include <asm/pgtable.h>
 
 #include "mmu.h"
 
@@ -30,8 +29,7 @@ void mmu_early_enable(unsigned long membase, unsigned long memsize,
 	set_ttbr(ttb);
 	set_domain(DOMAIN_MANAGER);
 
-	create_sections(ttb, 0, SZ_4G - 1, PMD_SECT_AP_WRITE |
-			PMD_SECT_AP_READ | PMD_TYPE_SECT);
+	create_flat_mapping(ttb);
 
 	map_cachable(membase, memsize);
 
diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c
index a9a5f2f8c..f0f279ffa 100644
--- a/arch/arm/cpu/mmu.c
+++ b/arch/arm/cpu/mmu.c
@@ -27,14 +27,12 @@
 #include <asm/barebox-arm.h>
 #include <asm/system.h>
 #include <asm/cache.h>
-#include <asm/pgtable.h>
 #include <memory.h>
 #include <asm/system_info.h>
 #include <asm/sections.h>
 
 #include "mmu.h"
 
-#define PMD_SECT_DEF_UNCACHED (PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT)
 #define PMD_SECT_DEF_CACHED (PMD_SECT_WB | PMD_SECT_DEF_UNCACHED)
 
 static uint32_t *ttb;
@@ -459,9 +457,7 @@ static int mmu_init(void)
 	set_ttbr(ttb);
 	set_domain(DOMAIN_MANAGER);
 
-	/* create a flat mapping using 1MiB sections */
-	create_sections(ttb, 0, SZ_4G - 1, PMD_SECT_AP_WRITE | PMD_SECT_AP_READ |
-			PMD_TYPE_SECT);
+	create_flat_mapping(ttb);
 	__mmu_cache_flush();
 
 	vectors_init();
diff --git a/arch/arm/cpu/mmu.h b/arch/arm/cpu/mmu.h
index fa01cbe4e..0c9e44cd2 100644
--- a/arch/arm/cpu/mmu.h
+++ b/arch/arm/cpu/mmu.h
@@ -1,6 +1,7 @@
 #ifndef __ARM_MMU_H
 #define __ARM_MMU_H
 
+#include <asm/pgtable.h>
 #include <linux/sizes.h>
 
 #ifdef CONFIG_MMU
@@ -40,5 +41,12 @@ create_sections(uint32_t *ttb, unsigned long first,
 	}
 }
 
+#define PMD_SECT_DEF_UNCACHED (PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT)
+
+static inline void create_flat_mapping(uint32_t *ttb)
+{
+	/* create a flat mapping using 1MiB sections */
+	create_sections(ttb, 0, SZ_4G - 1, PMD_SECT_DEF_UNCACHED);
+}
 
 #endif /* __ARM_MMU_H */
-- 
2.17.0


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  parent reply	other threads:[~2018-05-22  3:16 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-22  3:14 [PATCH v4 00/29] ARM MMU code improvements and on-demand PTE allocation Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 01/29] ARM: mmu: Remove unused ARM_VECTORS_SIZE Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 02/29] ARM: mmu: Make use of IS_ALIGNED in arm_mmu_remap_sdram() Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 03/29] ARM: mmu: Use ALIGN and ALIGN_DOWN in map_cachable() Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 04/29] ARM: mmu: Introduce set_ttbr() Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 05/29] ARM: mmu: Introduce set_domain() Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 06/29] ARM: mmu: Share code for create_sections() Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 07/29] ARM: mmu: Separate index and address in create_sections() Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 08/29] sizes.h: Sync with Linux 4.16 Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 09/29] ARM: mmu: Specify size in bytes in create_sections() Andrey Smirnov
2018-05-22  3:14 ` Andrey Smirnov [this message]
2018-05-22  3:14 ` [PATCH v4 11/29] ARM: mmu: Share PMD_SECT_DEF_CACHED Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 12/29] ARM: mmu: Drop needless shifting in map_io_sections() Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 13/29] ARM: mmu: Replace hardcoded shifts with pgd_index() from Linux Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 14/29] ARM: mmu: Trivial simplification in arm_mmu_remap_sdram() Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 15/29] ARM: mmu: Replace various SZ_1M with PGDIR_SIZE Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 16/29] ARM: mmu: Use PAGE_SIZE when specifying size of one page Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 17/29] ARM: mmu: Define and use PTRS_PER_PTE Andrey Smirnov
2018-05-22  3:14 ` [PATCH v4 18/29] ARM: mmu: Use PAGE_SIZE instead of magic right shift by 12 Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 19/29] ARM: mmu: Use xmemalign in arm_create_pte() Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 20/29] ARM: mmu: Use xmemalign in mmu_init() Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 21/29] ARM: mmu: Share code between dma_alloc_*() functions Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 22/29] ARM: mmu: Pass PTE flags a parameter to arm_create_pte() Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 23/29] ARM: mmu: Make sure that address is 1M aligned in arm_create_pte() Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 24/29] ARM: mmu: Use find_pte() to find PTE in create_vector_table() Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 25/29] ARM: mmu: Use dma_inv_range() in dma_sync_single_for_cpu() Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 26/29] ARM: mmu: Simplify the use of dma_flush_range() Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 27/29] ARM: mmu: Implement on-demand PTE allocation Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 28/29] ARM: mmu: Introduce ARM_TTB_SIZE Andrey Smirnov
2018-05-22  3:15 ` [PATCH v4 29/29] ARM: mmu: Do not try to pick early TTB up Andrey Smirnov
2018-05-22  7:16 ` [PATCH v4 00/29] ARM MMU code improvements and on-demand PTE allocation Sascha Hauer
2018-05-22 18:37   ` Andrey Smirnov

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