From: Jan Kiszka <jan.kiszka@siemens.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v4 05/14] ARM: Factor out reusable psci_get_cpu_stack_top
Date: Fri, 27 Feb 2015 14:28:04 +0100 [thread overview]
Message-ID: <798ae991e4cbc7b94f5ab7899c2ca383d0e7027f.1425043693.git.jan.kiszka@siemens.com> (raw)
In-Reply-To: <cover.1425043693.git.jan.kiszka@siemens.com>
This algorithm will be useful on Tegra as well, plus we will need it for
making _psci_target_pc per-CPU.
CC: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
arch/arm/cpu/armv7/psci.S | 14 ++++++++++++++
arch/arm/cpu/armv7/sunxi/psci.S | 17 +++++++----------
2 files changed, 21 insertions(+), 10 deletions(-)
diff --git a/arch/arm/cpu/armv7/psci.S b/arch/arm/cpu/armv7/psci.S
index 315c20b..99ce490 100644
--- a/arch/arm/cpu/armv7/psci.S
+++ b/arch/arm/cpu/armv7/psci.S
@@ -170,6 +170,20 @@ ENTRY(psci_cpu_off_common)
bx lr
ENDPROC(psci_cpu_off_common)
+@ expects CPU ID in r4 (will be overwritten) and returns stack top in r5
+ENTRY(psci_get_cpu_stack_top)
+ mov r5, #0x400 @ 1kB of stack per CPU
+ mul r4, r4, 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, r4 @ here's our stack!
+
+ bx lr
+ENDPROC(psci_get_cpu_stack_top)
+
ENTRY(psci_cpu_entry)
@ Set SMP bit
mrc p15, 0, r0, c1, c0, 1 @ ACTLR
diff --git a/arch/arm/cpu/armv7/sunxi/psci.S b/arch/arm/cpu/armv7/sunxi/psci.S
index 9ea3ce8..53d5e3f 100644
--- a/arch/arm/cpu/armv7/sunxi/psci.S
+++ b/arch/arm/cpu/armv7/sunxi/psci.S
@@ -214,6 +214,8 @@ psci_cpu_off:
.globl psci_arch_init
psci_arch_init:
+ mov r6, lr
+
movw r4, #(GICD_BASE & 0xffff)
movt r4, #(GICD_BASE >> 16)
@@ -240,16 +242,11 @@ psci_arch_init:
isb
armv7_get_cpu_id r4
- mov r5, #0x400 @ 1kB of stack per CPU
- mul r4, r4, r5
-
- adr r5, text_end @ end of text
- add r5, r5, #0x2000 @ Skip two pages
- lsr r5, r5, #12 @ Align to start of page
- lsl r5, r5, #12
- sub sp, r5, r4 @ here's our stack!
+ bl psci_get_cpu_stack_top
+ mov sp, r5
- bx lr
+ bx r6
-text_end:
+ .globl psci_text_end
+psci_text_end:
.popsection
--
2.1.4
next prev parent reply other threads:[~2015-02-27 13:28 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-27 13:27 [U-Boot] [PATCH v4 00/14] Add PSCI support for Jetson TK1/Tegra124 + CNTFRQ fix Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 01/14] sun7i: Remove duplicate call to psci_arch_init Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 02/14] ARM: Factor out armv7_get_cpu_id macro Jan Kiszka
2015-02-28 13:56 ` Marc Zyngier
2015-03-02 9:40 ` Jan Kiszka
2015-03-02 10:19 ` Marc Zyngier
2015-03-02 12:14 ` Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 03/14] ARM: Factor out reusable psci_cpu_off_common Jan Kiszka
2015-02-28 13:55 ` Marc Zyngier
2015-02-27 13:28 ` [U-Boot] [PATCH v4 04/14] ARM: Factor out reusable psci_cpu_entry Jan Kiszka
2015-02-28 13:53 ` Marc Zyngier
2015-03-01 9:16 ` Ian Campbell
2015-02-27 13:28 ` Jan Kiszka [this message]
2015-02-27 13:28 ` [U-Boot] [PATCH v4 06/14] ARM: Put target PC for PSCI CPU_ON on per-CPU stack Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 07/14] tegra124: Add more registers to struct mc_ctlr Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 08/14] virt-dt: Allow reservation of secure region when in a RAM carveout Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 09/14] tegra: Make tegra_powergate_power_on public Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 10/14] tegra: Add ap_pm_init hook Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 11/14] tegra124: Add PSCI support for Tegra124 Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 12/14] jetson-tk1: Add PSCI configuration options and reserve secure code Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 13/14] tegra124: Reserve secure RAM using MC_SECURITY_CFG{0, 1}_0 Jan Kiszka
2015-02-27 13:28 ` [U-Boot] [PATCH v4 14/14] tegra: Set CNTFRQ for secondary CPUs Jan Kiszka
2015-03-08 20:08 ` [U-Boot] [PATCH v4 00/14] Add PSCI support for Jetson TK1/Tegra124 + CNTFRQ fix Ian Campbell
2015-03-09 6:52 ` Jan Kiszka
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