From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Sat, 21 Apr 2007 08:59:44 +0000 (+0100)
Subject: [ARM] mm 1: Combine mem_type domain into prot_* at init time
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2497f0a8125e307cf1fd4222bab53f66305eba27;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[ARM] mm 1: Combine mem_type domain into prot_* at init time

Rather than combining the domain for a particular memory type with
the protection information each time we want to use it, do so when
we fix up the mem_type array at initialisation time.

Rename struct mem_types to be mem_type - each structure is one
memory type description, not several.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 94fd4bf5cb9e..6178be0242f2 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -176,14 +176,14 @@ void adjust_cr(unsigned long mask, unsigned long set)
 }
 #endif
 
-struct mem_types {
+struct mem_type {
 	unsigned int	prot_pte;
 	unsigned int	prot_l1;
 	unsigned int	prot_sect;
 	unsigned int	domain;
 };
 
-static struct mem_types mem_types[] __initdata = {
+static struct mem_type mem_types[] __initdata = {
 	[MT_DEVICE] = {
 		.prot_pte  = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
 				L_PTE_WRITE,
@@ -368,6 +368,14 @@ static void __init build_mem_type_table(void)
 	}
 	printk("Memory policy: ECC %sabled, Data cache %s\n",
 		ecc_mask ? "en" : "dis", cp->policy);
+
+	for (i = 0; i < ARRAY_SIZE(mem_types); i++) {
+		struct mem_type *t = &mem_types[i];
+		if (t->prot_l1)
+			t->prot_l1 |= PMD_DOMAIN(t->domain);
+		if (t->prot_sect)
+			t->prot_sect |= PMD_DOMAIN(t->domain);
+	}
 }
 
 #define vectors_base()	(vectors_high() ? 0xffff0000 : 0)
@@ -458,8 +466,8 @@ void __init create_mapping(struct map_desc *md)
 
 	domain	  = mem_types[md->type].domain;
 	prot_pte  = __pgprot(mem_types[md->type].prot_pte);
-	prot_l1   = mem_types[md->type].prot_l1 | PMD_DOMAIN(domain);
-	prot_sect = mem_types[md->type].prot_sect | PMD_DOMAIN(domain);
+	prot_l1   = mem_types[md->type].prot_l1;
+	prot_sect = mem_types[md->type].prot_sect;
 
 	/*
 	 * Catch 36-bit addresses