Merge tag 'locks-v3.16-2' of git://git.samba.org/jlayton/linux
[linux/fpc-iii.git] / arch / arm / mm / l2c-l2x0-resume.S
blob99b05f21a59a4a9d6fe22852cf1526e4508bfa52
1 /*
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
4  * processor state.
5  *
6  * This code can only be used to if you are running in the secure world.
7  */
8 #include <linux/linkage.h>
9 #include <asm/hardware/cache-l2x0.h>
11         .text
13 ENTRY(l2c310_early_resume)
14         adr     r0, 1f
15         ldr     r2, [r0]
16         add     r0, r2, r0
18         ldmia   r0, {r1, r2, r3, r4, r5, r6, r7, r8}
19         @ r1 = phys address of L2C-310 controller
20         @ r2 = aux_ctrl
21         @ r3 = tag_latency
22         @ r4 = data_latency
23         @ r5 = filter_start
24         @ r6 = filter_end
25         @ r7 = prefetch_ctrl
26         @ r8 = pwr_ctrl
28         @ Check that the address has been initialised
29         teq     r1, #0
30         moveq   pc, lr
32         @ The prefetch and power control registers are revision dependent
33         @ and can be written whether or not the L2 cache is enabled
34         ldr     r0, [r1, #L2X0_CACHE_ID]
35         and     r0, r0, #L2X0_CACHE_ID_RTL_MASK
36         cmp     r0, #L310_CACHE_ID_RTL_R2P0
37         strcs   r7, [r1, #L310_PREFETCH_CTRL]
38         cmp     r0, #L310_CACHE_ID_RTL_R3P0
39         strcs   r8, [r1, #L310_POWER_CTRL]
41         @ Don't setup the L2 cache if it is already enabled
42         ldr     r0, [r1, #L2X0_CTRL]
43         tst     r0, #L2X0_CTRL_EN
44         movne   pc, lr
46         str     r3, [r1, #L310_TAG_LATENCY_CTRL]
47         str     r4, [r1, #L310_DATA_LATENCY_CTRL]
48         str     r6, [r1, #L310_ADDR_FILTER_END]
49         str     r5, [r1, #L310_ADDR_FILTER_START]
51         str     r2, [r1, #L2X0_AUX_CTRL]
52         mov     r9, #L2X0_CTRL_EN
53         str     r9, [r1, #L2X0_CTRL]
54         mov     pc, lr
55 ENDPROC(l2c310_early_resume)
57         .align
58 1:      .long   l2x0_saved_regs - .