ARM: Factor out early mmu code

Move early mmu code to a separate file so that it can be
used from the pbl and the regular image. Disabling the mmu
can be dropped since the regular mmu code is now able to
pickup an enabled mmu.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 0 insertions, 72 deletions

diff --git a/arch/arm/cpu/start-pbl.c b/arch/arm/cpu/start-pbl.c
index 9c168b3c24..0599c57e75 100644
--- a/arch/arm/cpu/start-pbl.c
+++ b/arch/arm/cpu/start-pbl.c
@@ -48,82 +48,10 @@ void __naked __section(.text_head_entry) pbl_start(void)
 extern void *input_data;
 extern void *input_data_end;
 
-static unsigned long *ttb;
-
-static void create_sections(unsigned long addr, int size_m, unsigned int flags)
-{
-	int i;
-
-	addr >>= 20;
-
-	for (i = size_m; i > 0; i--, addr++)
-		ttb[addr] = (addr << 20) | flags;
-}
-
-static void map_cachable(unsigned long start, unsigned long size)
-{
-	start &= ~(SZ_1M - 1);
-	size = (size + (SZ_1M - 1)) & ~(SZ_1M - 1);
-
-	create_sections(start, size >> 20, PMD_SECT_AP_WRITE |
-			PMD_SECT_AP_READ | PMD_TYPE_SECT | PMD_SECT_WB);
-}
-
-static void mmu_enable(unsigned long compressed_start, unsigned int len)
-{
-	int i;
-
-	/* Set the ttb register */
-	asm volatile ("mcr  p15,0,%0,c2,c0,0" : : "r"(ttb) /*:*/);
-
-	/* Set the Domain Access Control Register */
-	i = 0x3;
-	asm volatile ("mcr  p15,0,%0,c3,c0,0" : : "r"(i) /*:*/);
-
-	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);
-
-	__mmu_cache_on();
-}
-
-static void mmu_disable(void)
-{
-	__mmu_cache_flush();
-	__mmu_cache_off();
-}
-
 static void barebox_uncompress(void *compressed_start, unsigned int len)
 {
-	/*
-	 * remap_cached currently does not work rendering the feature
-	 * of enabling the MMU in the PBL useless. disable for now.
-	 */
-	int use_mmu = 0;
-
-	ttb = (void *)((free_mem_ptr - 0x4000) & ~0x3fff);
-
-	if (use_mmu)
-		mmu_enable((unsigned long)compressed_start, len);
-
 	pbl_barebox_uncompress((void*)TEXT_BASE, compressed_start, len);
 
-	if (use_mmu)
-		mmu_disable();
-
 	flush_icache();
 }