TX6 Release 2013-04-22

[karo-tx-uboot.git] / arch / arm / lib / cache-cp15.c

diff --git a/arch/arm/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c
index b6e5e95530b3793f0be70289eb53ed7207cb305b..0ab08b2c4d9da96f996cefe0e668f1f3c6b9ceee 100644 (file)
--- a/arch/arm/lib/cache-cp15.c
+++ b/arch/arm/lib/cache-cp15.c
@@ -34,16 +34,6 @@ void __arm_init_before_mmu(void)
 void arm_init_before_mmu(void)
        __attribute__((weak, alias("__arm_init_before_mmu")));
 
-static void cp_delay (void)
-{
-       volatile int i;
-
-       /* copro seems to need some delay between reading and writing */
-       for (i = 0; i < 100; i++)
-               nop();
-       asm volatile("" : : : "memory");
-}
-
 void set_section_dcache(int section, enum dcache_option option)
 {
        u32 *page_table = (u32 *)gd->arch.tlb_addr;
@@ -97,6 +87,7 @@ static inline void dram_bank_mmu_setup(int bank)
 /* to activate the MMU we need to set up virtual memory: use 1M areas */
 static inline void mmu_setup(void)
 {
+       u32 *page_table = (u32 *)gd->arch.tlb_addr;
        int i;
        u32 reg;
 
@@ -109,15 +100,16 @@ static inline void mmu_setup(void)
                dram_bank_mmu_setup(i);
        }
 
-       /* Copy the page table address to cp15 */
-       asm volatile("mcr p15, 0, %0, c2, c0, 0"
-                    : : "r" (gd->arch.tlb_addr) : "memory");
-       /* Set the access control to all-supervisor */
-       asm volatile("mcr p15, 0, %0, c3, c0, 0"
-                    : : "r" (~0));
+       asm volatile(
+               /* Copy the page table address to cp15 */
+               "mcr p15, 0, %0, c2, c0, 0\n"
+               /* Set the access control to all-supervisor */
+               "mcr p15, 0, %1, c3, c0, 0\n"
+               :
+               : "r"(page_table), "r"(~0)
+               );
        /* and enable the mmu */
        reg = get_cr(); /* get control reg. */
-       cp_delay();
        set_cr(reg | CR_M);
 }
 
@@ -135,7 +127,6 @@ static void cache_enable(uint32_t cache_bit)
        if ((cache_bit == CR_C) && !mmu_enabled())
                mmu_setup();
        reg = get_cr(); /* get control reg. */
-       cp_delay();
        set_cr(reg | cache_bit);
 }
 
@@ -145,7 +136,6 @@ static void cache_disable(uint32_t cache_bit)
        uint32_t reg;
 
        reg = get_cr();
-       cp_delay();
 
        if (cache_bit == CR_C) {
                /* if cache isn;t enabled no need to disable */
@@ -155,7 +145,6 @@ static void cache_disable(uint32_t cache_bit)
                cache_bit |= CR_M;
        }
        reg = get_cr();
-       cp_delay();
        if (cache_bit == (CR_C | CR_M))
                flush_dcache_all();
        set_cr(reg & ~cache_bit);