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32 * microblaze_invalidate_icache_range(unsigned int cacheaddr, unsigned int len)
34 * Invalidate an ICache range
37 * 'cacheaddr' - address in the Icache where invalidation begins
38 * 'len' - length (in bytes) worth of Icache to be invalidated
41 *******************************************************************************/
43 #include "xparameters.h"
45 #define MICROBLAZE_MSR_ICACHE_ENABLE 0x00000020
46 #define MICROBLAZE_MSR_INTR_ENABLE 0x00000002
48 #ifndef XPAR_MICROBLAZE_ICACHE_LINE_LEN
49 #define XPAR_MICROBLAZE_ICACHE_LINE_LEN 1
52 #ifndef XPAR_MICROBLAZE_DCACHE_USE_WRITEBACK
53 #define MB_VERSION_LT_v720
57 .globl microblaze_invalidate_icache_range
58 .ent microblaze_invalidate_icache_range
61 microblaze_invalidate_icache_range:
63 #ifdef MB_VERSION_LT_v720 /* Disable Icache and interrupts before invalidating */
65 andi r10, r9, ~(MICROBLAZE_MSR_ICACHE_ENABLE | MICROBLAZE_MSR_INTR_ENABLE)
69 beqi r6, L_done /* Skip loop if size is zero */
71 add r6, r5, r6 /* Compute end address */
74 andi r6, r6, -(4 * XPAR_MICROBLAZE_ICACHE_LINE_LEN) /* Align end down to cache line */
75 andi r5, r5, -(4 * XPAR_MICROBLAZE_ICACHE_LINE_LEN) /* Align start down to cache line */
78 cmpu r18, r5, r6 /* Are we at the end? */
81 wic r5, r0 /* Invalidate the cache line */
83 brid L_start /* Branch to the beginning of the loop */
84 addik r5, r5, (XPAR_MICROBLAZE_ICACHE_LINE_LEN * 4) /* Increment the addrees by 4 (delay slot) */
87 rtsd r15, 8 /* Return */
88 #ifdef MB_VERSION_LT_v720 /* restore MSR only for MB version < v7.20 */
93 .end microblaze_invalidate_icache_range