2 * L2C-310 early resume code. This can be used by platforms to restore
3 * the settings of their L2 cache controller before restoring the
6 * This code can only be used to if you are running in the secure world.
8 #include <linux/linkage.h>
9 #include <asm/assembler.h>
10 #include <asm/hardware/cache-l2x0.h>
14 ENTRY(l2c310_early_resume)
19 ldmia r0, {r1, r2, r3, r4, r5, r6, r7, r8}
20 @ r1 = phys address of L2C-310 controller
29 @ Check that the address has been initialised
33 @ The prefetch and power control registers are revision dependent
34 @ and can be written whether or not the L2 cache is enabled
35 ldr r0, [r1, #L2X0_CACHE_ID]
36 and r0, r0, #L2X0_CACHE_ID_RTL_MASK
37 cmp r0, #L310_CACHE_ID_RTL_R2P0
38 strcs r7, [r1, #L310_PREFETCH_CTRL]
39 cmp r0, #L310_CACHE_ID_RTL_R3P0
40 strcs r8, [r1, #L310_POWER_CTRL]
42 @ Don't setup the L2 cache if it is already enabled
43 ldr r0, [r1, #L2X0_CTRL]
47 str r3, [r1, #L310_TAG_LATENCY_CTRL]
48 str r4, [r1, #L310_DATA_LATENCY_CTRL]
49 str r6, [r1, #L310_ADDR_FILTER_END]
50 str r5, [r1, #L310_ADDR_FILTER_START]
52 str r2, [r1, #L2X0_AUX_CTRL]
54 str r9, [r1, #L2X0_CTRL]
56 ENDPROC(l2c310_early_resume)
59 1: .long l2x0_saved_regs - .