From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Tue, 26 Jul 2005 18:51:26 +0000 (+0100)
Subject: [PATCH] ARM SMP: Mark device mappings as "device" in ARMv6 parlance
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=186efd5275bbe7ffb73d939c1ce5690682668200;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

[PATCH] ARM SMP: Mark device mappings as "device" in ARMv6 parlance

ARMv6 introduces memory types into the page tables.  Mark devices
mappings with the "shared device" memory type.

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

diff --git a/arch/arm/mm/mm-armv.c b/arch/arm/mm/mm-armv.c
index b19f00e99a21..e33fe4229d05 100644
--- a/arch/arm/mm/mm-armv.c
+++ b/arch/arm/mm/mm-armv.c
@@ -425,6 +425,9 @@ static void __init build_mem_type_table(void)
 		mem_types[MT_ROM].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE;
 		mem_types[MT_MINICLEAN].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE;
 		mem_types[MT_CACHECLEAN].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE;
+
+		mem_types[MT_DEVICE].prot_pte |= L_PTE_BUFFERABLE;
+		mem_types[MT_DEVICE].prot_sect |= PMD_SECT_BUFFERED;
 	}
 
 	cp = &cache_policies[cachepolicy];