#include <config.h>
#include <linux/linkage.h>
+#include <asm/macro.h>
#include <asm/psci.h>
.pushsection ._secure.text, "ax"
pop {r4-r7, lr}
movs pc, lr @ Return to the kernel
+@ Requires dense and single-cluster CPU ID space
+ENTRY(psci_get_cpu_id)
+ mrc p15, 0, r0, c0, c0, 5 /* read MPIDR */
+ and r0, r0, #0xff /* return CPU ID in cluster */
+ bx lr
+ENDPROC(psci_get_cpu_id)
+.weak psci_get_cpu_id
+
+/* Imported from Linux kernel */
+LENTRY(v7_flush_dcache_all)
+ dmb @ ensure ordering with previous memory accesses
+ mrc p15, 1, r0, c0, c0, 1 @ read clidr
+ ands r3, r0, #0x7000000 @ extract loc from clidr
+ mov r3, r3, lsr #23 @ left align loc bit field
+ beq finished @ if loc is 0, then no need to clean
+ mov r10, #0 @ start clean at cache level 0
+flush_levels:
+ add r2, r10, r10, lsr #1 @ work out 3x current cache level
+ mov r1, r0, lsr r2 @ extract cache type bits from clidr
+ and r1, r1, #7 @ mask of the bits for current cache only
+ cmp r1, #2 @ see what cache we have at this level
+ blt skip @ skip if no cache, or just i-cache
+ mrs r9, cpsr @ make cssr&csidr read atomic
+ mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr
+ isb @ isb to sych the new cssr&csidr
+ mrc p15, 1, r1, c0, c0, 0 @ read the new csidr
+ msr cpsr_c, r9
+ and r2, r1, #7 @ extract the length of the cache lines
+ add r2, r2, #4 @ add 4 (line length offset)
+ ldr r4, =0x3ff
+ ands r4, r4, r1, lsr #3 @ find maximum number on the way size
+ clz r5, r4 @ find bit position of way size increment
+ ldr r7, =0x7fff
+ ands r7, r7, r1, lsr #13 @ extract max number of the index size
+loop1:
+ mov r9, r7 @ create working copy of max index
+loop2:
+ orr r11, r10, r4, lsl r5 @ factor way and cache number into r11
+ orr r11, r11, r9, lsl r2 @ factor index number into r11
+ mcr p15, 0, r11, c7, c14, 2 @ clean & invalidate by set/way
+ subs r9, r9, #1 @ decrement the index
+ bge loop2
+ subs r4, r4, #1 @ decrement the way
+ bge loop1
+skip:
+ add r10, r10, #2 @ increment cache number
+ cmp r3, r10
+ bgt flush_levels
+finished:
+ mov r10, #0 @ swith back to cache level 0
+ mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr
+ dsb st
+ isb
+ bx lr
+ENDPROC(v7_flush_dcache_all)
+
+ENTRY(psci_disable_smp)
+ mrc p15, 0, r0, c1, c0, 1 @ ACTLR
+ bic r0, r0, #(1 << 6) @ Clear SMP bit
+ mcr p15, 0, r0, c1, c0, 1 @ ACTLR
+ isb
+ dsb
+ bx lr
+ENDPROC(psci_disable_smp)
+.weak psci_disable_smp
+
+ENTRY(psci_enable_smp)
+ mrc p15, 0, r0, c1, c0, 1 @ ACTLR
+ orr r0, r0, #(1 << 6) @ Set SMP bit
+ mcr p15, 0, r0, c1, c0, 1 @ ACTLR
+ isb
+ bx lr
+ENDPROC(psci_enable_smp)
+.weak psci_enable_smp
+
+ENTRY(psci_cpu_off_common)
+ push {lr}
+
+ mrc p15, 0, r0, c1, c0, 0 @ SCTLR
+ bic r0, r0, #(1 << 2) @ Clear C bit
+ mcr p15, 0, r0, c1, c0, 0 @ SCTLR
+ isb
+ dsb
+
+ bl v7_flush_dcache_all
+
+ clrex @ Why???
+
+ bl psci_disable_smp
+
+ pop {lr}
+ bx lr
+ENDPROC(psci_cpu_off_common)
+
+@ expects CPU ID in r0 and returns stack top in r0
+ENTRY(psci_get_cpu_stack_top)
+ mov r5, #0x400 @ 1kB of stack per CPU
+ mul r0, r0, r5
+
+ ldr r5, =psci_text_end @ end of monitor text
+ add r5, r5, #0x2000 @ Skip two pages
+ lsr r5, r5, #12 @ Align to start of page
+ lsl r5, r5, #12
+ sub r5, r5, #4 @ reserve 1 word for target PC
+ sub r0, r5, r0 @ here's our stack!
+
+ bx lr
+ENDPROC(psci_get_cpu_stack_top)
+
+ENTRY(psci_cpu_entry)
+ bl psci_enable_smp
+
+ bl _nonsec_init
+
+ bl psci_get_cpu_id @ CPU ID => r0
+ bl psci_get_cpu_stack_top @ stack top => r0
+ ldr r0, [r0] @ target PC at stack top
+ b _do_nonsec_entry
+ENDPROC(psci_cpu_entry)
+
.popsection
projects / karo-tx-uboot.git / blobdiff