Changeset 67d02bb in mainline for boot/arch/arm32/src/main.c

Timestamp:

2013-08-03T22:31:18Z (11 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

186b919

Parents:

296a80e

Message:

rm32, boot: Clear entire Dcache on startup.

Specs require this.

File:

• boot/arch/arm32/src/main.c (modified) (3 diffs)

boot/arch/arm32/src/main.c

@@ -53 +53 @@
 extern void *bdata_end;
 
-
-static inline void invalidate_icache(void)
-{
-        /* ICIALLU Invalidate entire ICache */
-        asm volatile ("mov r0, #0\n" "mcr p15, 0, r0, c7, c5, 0\n" ::: "r0" );
-}
-
-static inline void invalidate_dcache(void *address, size_t size)
-{
-        const uintptr_t addr = (uintptr_t)address;
-        for (uintptr_t a = addr; a < addr + size; a += 4) {
-                /* DCIMVAC - invalidate by address to the point of coherence */
-                asm volatile ("mcr p15, 0, %[a], c7, c6, 1\n" :: [a]"r"(a) : );
-        }
-}
-
 static inline void clean_dcache_poc(void *address, size_t size)
 {
@@ -82 +66 @@
 void bootstrap(void)
 {
-        /* Make sure we run in memory code when caches are enabled,
-         * make sure we read memory data too. This part is ARMv7 specific as
-         * ARMv7 no longer invalidates caches on restart.
-         * See chapter B2.2.2 of ARM Architecture Reference Manual p. B2-1263*/
-        invalidate_icache();
-        invalidate_dcache(&bdata_start, &bdata_end - &bdata_start);
-
         /* Enable MMU and caches */
         mmu_start();
@@ -105 +82 @@
                     components[i].start, components[i].name, components[i].inflated,
                     components[i].size);
-                /* Make sure there is no cache garbage in read locations */
-                invalidate_dcache(components[i].start, components[i].size);
         }