[PATCH 21/28] ARM pbl: make MMU functional again

[Sascha Hauer]

We now have memory information available and thus can simply
map the available SDRAM space instead of selecting the regions
we need manually.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 arch/arm/cpu/start-pbl.c |   22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/arch/arm/cpu/start-pbl.c b/arch/arm/cpu/start-pbl.c
index 751e4fa..98c1ae3 100644
--- a/arch/arm/cpu/start-pbl.c
+++ b/arch/arm/cpu/start-pbl.c
@@ -78,10 +78,12 @@ static void map_cachable(unsigned long start, unsigned long size)
 			PMD_SECT_AP_READ | PMD_TYPE_SECT | PMD_SECT_WB);
 }
 
-static void mmu_enable(unsigned long compressed_start, unsigned int len)
+static void mmu_enable(unsigned long membase, unsigned long memsize)
 {
 	int i;
 
+	arm_set_cache_functions();
+
 	/* Set the ttb register */
 	asm volatile ("mcr  p15,0,%0,c2,c0,0" : : "r"(ttb) /*:*/);
 
@@ -91,20 +93,8 @@ static void mmu_enable(unsigned long compressed_start, unsigned int len)
 
 	create_sections(0, 4096, PMD_SECT_AP_WRITE |
 			PMD_SECT_AP_READ | PMD_TYPE_SECT);
-	/*
-	 * Setup all regions we need cacheable, namely:
-	 * - the stack
-	 * - the decompressor code
-	 * - the compressed image
-	 * - the uncompressed image
-	 * - the early malloc space
-	 */
-	map_cachable(STACK_BASE, STACK_SIZE);
-	map_cachable((unsigned long)&_text,
-			(unsigned long)&_end - (unsigned long)&_text);
-	map_cachable((unsigned long)compressed_start, len);
-	map_cachable(TEXT_BASE, len * 4);
-	map_cachable(free_mem_ptr, free_mem_end_ptr - free_mem_ptr);
+
+	map_cachable(membase, memsize);
 
 	__mmu_cache_on();
 }
@@ -126,7 +116,7 @@ static noinline void __barebox_arm_entry(uint32_t membase, uint32_t memsize,
 	void (*barebox)(uint32_t, uint32_t, uint32_t);
 	uint32_t offset;
 	uint32_t pg_start, pg_end, pg_len;
-	int use_mmu = 0;
+	int use_mmu = IS_ENABLED(CONFIG_MMU);
 
 	/* Get offset between linked address and runtime address */
 	offset = get_runtime_offset();
-- 
1.7.10.4