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32 * microblaze_init_icache_range (unsigned int cache_start, unsigned int cache_len)
34 * Invalidate icache on the microblaze
37 * 'cache_start' - address in the Icache where invalidation begins
38 * 'cache_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
53 .globl microblaze_init_icache_range
54 .ent microblaze_init_icache_range
57 microblaze_init_icache_range:
59 mfs r9, rmsr /* Disable Icache and interrupts before invalidating */
60 andi r10, r9, ~(MICROBLAZE_MSR_ICACHE_ENABLE | MICROBLAZE_MSR_INTR_ENABLE)
63 andi r5, r5, -(4 * XPAR_MICROBLAZE_ICACHE_LINE_LEN) /* Align to cache line */
65 add r6, r5, r6 /* Compute end */
66 andi r6, r6, -(4 * XPAR_MICROBLAZE_ICACHE_LINE_LEN) /* Align to cache line */
69 wic r5, r0 /* Invalidate the Cache (delay slot) */
71 cmpu r18, r5, r6 /* Are we at the end ? */
74 brid L_start /* Branch to the beginning of the loop */
75 addik r5, r5, (XPAR_MICROBLAZE_ICACHE_LINE_LEN * 4) /* Increment the addrees by 4 (delay slot) */
78 rtsd r15, 8 /* Return */
80 .end microblaze_init_icache_range