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31 * microblaze_invalidate_dcache()
33 * Invalidate the entire L1 DCache
36 *******************************************************************************/
38 #include "xparameters.h"
40 #define MICROBLAZE_MSR_DCACHE_ENABLE 0x00000080
41 #define MICROBLAZE_MSR_INTR_ENABLE 0x00000002
43 #ifndef XPAR_MICROBLAZE_DCACHE_LINE_LEN
44 #define XPAR_MICROBLAZE_DCACHE_LINE_LEN 1
47 #ifndef XPAR_MICROBLAZE_DCACHE_USE_WRITEBACK
48 #define MB_VERSION_LT_v720
52 .globl microblaze_invalidate_dcache
53 .ent microblaze_invalidate_dcache
56 microblaze_invalidate_dcache:
58 #ifdef MB_VERSION_LT_v720 /* Disable Dcache and interrupts before invalidating */
60 andi r10, r9, ~(MICROBLAZE_MSR_DCACHE_ENABLE | MICROBLAZE_MSR_INTR_ENABLE)
63 addik r5, r0, XPAR_MICROBLAZE_DCACHE_BASEADDR & (-(4 * XPAR_MICROBLAZE_DCACHE_LINE_LEN))
64 addik r6, r5, XPAR_MICROBLAZE_DCACHE_BYTE_SIZE & (-(4 * XPAR_MICROBLAZE_DCACHE_LINE_LEN)) /* Compute end */
67 wdc r5, r0 /* Invalidate the Cache */
69 cmpu r18, r5, r6 /* Are we at the end? */
72 brid L_start /* Branch to the beginning of the loop */
73 addik r5, r5, (XPAR_MICROBLAZE_DCACHE_LINE_LEN * 4) /* Increment the addrees by 4 (delay slot) */
76 rtsd r15, 8 /* Return */
77 #ifdef MB_VERSION_LT_v720 /* restore MSR only for MB version < v7.20 */
83 .end microblaze_invalidate_dcache