summaryrefslogtreecommitdiff
path: root/arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S')
-rw-r--r--arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S132
1 files changed, 132 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S b/arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S
index 2a88aab..886576e 100644
--- a/arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S
+++ b/arch/arm/cpu/armv8/fsl-lsch3/lowlevel.S
@@ -42,10 +42,142 @@ ENTRY(lowlevel_init)
ldr x0, =secondary_boot_func
blr x0
2:
+
+#ifdef CONFIG_FSL_TZPC_BP147
+ /* Set Non Secure access for all devices protected via TZPC */
+ ldr x1, =TZPCDECPROT_0_SET_BASE /* Decode Protection-0 Set Reg */
+ orr w0, w0, #1 << 3 /* DCFG_RESET is accessible from NS world */
+ str w0, [x1]
+
+ isb
+ dsb sy
+#endif
+
+#ifdef CONFIG_FSL_TZASC_400
+ /* Set TZASC so that:
+ * a. We use only Region0 whose global secure write/read is EN
+ * b. We use only Region0 whose NSAID write/read is EN
+ *
+ * NOTE: As per the CCSR map doc, TZASC 3 and TZASC 4 are just
+ * placeholders.
+ */
+ ldr x1, =TZASC_GATE_KEEPER(0)
+ ldr x0, [x1] /* Filter 0 Gate Keeper Register */
+ orr x0, x0, #1 << 0 /* Set open_request for Filter 0 */
+ str x0, [x1]
+
+ ldr x1, =TZASC_GATE_KEEPER(1)
+ ldr x0, [x1] /* Filter 0 Gate Keeper Register */
+ orr x0, x0, #1 << 0 /* Set open_request for Filter 0 */
+ str x0, [x1]
+
+ ldr x1, =TZASC_REGION_ATTRIBUTES_0(0)
+ ldr x0, [x1] /* Region-0 Attributes Register */
+ orr x0, x0, #1 << 31 /* Set Sec global write en, Bit[31] */
+ orr x0, x0, #1 << 30 /* Set Sec global read en, Bit[30] */
+ str x0, [x1]
+
+ ldr x1, =TZASC_REGION_ATTRIBUTES_0(1)
+ ldr x0, [x1] /* Region-1 Attributes Register */
+ orr x0, x0, #1 << 31 /* Set Sec global write en, Bit[31] */
+ orr x0, x0, #1 << 30 /* Set Sec global read en, Bit[30] */
+ str x0, [x1]
+
+ ldr x1, =TZASC_REGION_ID_ACCESS_0(0)
+ ldr w0, [x1] /* Region-0 Access Register */
+ mov w0, #0xFFFFFFFF /* Set nsaid_wr_en and nsaid_rd_en */
+ str w0, [x1]
+
+ ldr x1, =TZASC_REGION_ID_ACCESS_0(1)
+ ldr w0, [x1] /* Region-1 Attributes Register */
+ mov w0, #0xFFFFFFFF /* Set nsaid_wr_en and nsaid_rd_en */
+ str w0, [x1]
+
+ isb
+ dsb sy
+#endif
mov lr, x29 /* Restore LR */
ret
ENDPROC(lowlevel_init)
+hnf_pstate_poll:
+ /* x0 has the desired status, return 0 for success, 1 for timeout
+ * clobber x1, x2, x3, x4, x6, x7
+ */
+ mov x1, x0
+ mov x7, #0 /* flag for timeout */
+ mrs x3, cntpct_el0 /* read timer */
+ add x3, x3, #1200 /* timeout after 100 microseconds */
+ mov x0, #0x18
+ movk x0, #0x420, lsl #16 /* HNF0_PSTATE_STATUS */
+ mov w6, #8 /* HN-F node count */
+1:
+ ldr x2, [x0]
+ cmp x2, x1 /* check status */
+ b.eq 2f
+ mrs x4, cntpct_el0
+ cmp x4, x3
+ b.ls 1b
+ mov x7, #1 /* timeout */
+ b 3f
+2:
+ add x0, x0, #0x10000 /* move to next node */
+ subs w6, w6, #1
+ cbnz w6, 1b
+3:
+ mov x0, x7
+ ret
+
+hnf_set_pstate:
+ /* x0 has the desired state, clobber x1, x2, x6 */
+ mov x1, x0
+ /* power state to SFONLY */
+ mov w6, #8 /* HN-F node count */
+ mov x0, #0x10
+ movk x0, #0x420, lsl #16 /* HNF0_PSTATE_REQ */
+1: /* set pstate to sfonly */
+ ldr x2, [x0]
+ and x2, x2, #0xfffffffffffffffc /* & HNFPSTAT_MASK */
+ orr x2, x2, x1
+ str x2, [x0]
+ add x0, x0, #0x10000 /* move to next node */
+ subs w6, w6, #1
+ cbnz w6, 1b
+
+ ret
+
+ENTRY(__asm_flush_l3_cache)
+ /*
+ * Return status in x0
+ * success 0
+ * tmeout 1 for setting SFONLY, 2 for FAM, 3 for both
+ */
+ mov x29, lr
+ mov x8, #0
+
+ dsb sy
+ mov x0, #0x1 /* HNFPSTAT_SFONLY */
+ bl hnf_set_pstate
+
+ mov x0, #0x4 /* SFONLY status */
+ bl hnf_pstate_poll
+ cbz x0, 1f
+ mov x8, #1 /* timeout */
+1:
+ dsb sy
+ mov x0, #0x3 /* HNFPSTAT_FAM */
+ bl hnf_set_pstate
+
+ mov x0, #0xc /* FAM status */
+ bl hnf_pstate_poll
+ cbz x0, 1f
+ add x8, x8, #0x2
+1:
+ mov x0, x8
+ mov lr, x29
+ ret
+ENDPROC(__asm_flush_l3_cache)
+
/* Keep literals not used by the secondary boot code outside it */
.ltorg