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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 22/29] ARM: mmu: Pass PTE flags a parameter to arm_create_pte()
Date: Mon, 21 May 2018 20:15:03 -0700	[thread overview]
Message-ID: <20180522031510.25505-23-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20180522031510.25505-1-andrew.smirnov@gmail.com>

In order to make it possible to use this functions in contexts where
creating a new PTE of uncached pages in not appropriate, pass PTE
flags a parameter to arm_create_pte() and fix all of the current users
as necessary.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 arch/arm/cpu/mmu.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c
index 7d4432b98..1713238ad 100644
--- a/arch/arm/cpu/mmu.c
+++ b/arch/arm/cpu/mmu.c
@@ -87,7 +87,7 @@ static void arm_mmu_not_initialized_error(void)
  * We initially create a flat uncached mapping on it.
  * Not yet exported, but may be later if someone finds use for it.
  */
-static u32 *arm_create_pte(unsigned long virt)
+static u32 *arm_create_pte(unsigned long virt, uint32_t flags)
 {
 	u32 *table;
 	int i;
@@ -101,7 +101,7 @@ static u32 *arm_create_pte(unsigned long virt)
 	ttb[pgd_index(virt)] = (unsigned long)table | PMD_TYPE_TABLE;
 
 	for (i = 0; i < PTRS_PER_PTE; i++) {
-		table[i] = virt | PTE_TYPE_SMALL | pte_flags_uncached;
+		table[i] = virt | PTE_TYPE_SMALL | flags;
 		virt += PAGE_SIZE;
 	}
 
@@ -291,7 +291,8 @@ static void create_vector_table(unsigned long adr)
 		vectors = xmemalign(PAGE_SIZE, PAGE_SIZE);
 		pr_debug("Creating vector table, virt = 0x%p, phys = 0x%08lx\n",
 			 vectors, adr);
-		exc = arm_create_pte(ALIGN_DOWN(adr, PGDIR_SIZE));
+		exc = arm_create_pte(ALIGN_DOWN(adr, PGDIR_SIZE),
+				     pte_flags_uncached);
 		idx = (adr & (PGDIR_SIZE - 1)) >> PAGE_SHIFT;
 		exc[idx] = (u32)vectors | PTE_TYPE_SMALL | pte_flags_cached;
 	}
@@ -362,7 +363,7 @@ static void create_zero_page(void)
 		 */
 		pr_debug("zero page is in SDRAM area, currently not supported\n");
 	} else {
-		zero = arm_create_pte(0x0);
+		zero = arm_create_pte(0x0, pte_flags_uncached);
 		zero[0] = 0;
 		pr_debug("Created zero page\n");
 	}
-- 
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 ` [PATCH v4 10/29] ARM: mmu: Share code for initial flat mapping creation Andrey Smirnov
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 ` Andrey Smirnov [this message]
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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