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authorOlof Johansson <olof@lixom.net>2012-09-20 21:27:41 -0700
committerOlof Johansson <olof@lixom.net>2012-09-20 21:27:41 -0700
commitb612a85792192b70e6497619521772c38ace758e (patch)
tree0405e78c23b600153bee5a0e19a5129ddca832f9 /arch/arm/plat-mxc/ssi-fiq.S
parentea832c41dacbc4a5f3888d9ef7c38213914aba2a (diff)
parent3aec092eed5d8d2b19a62b0aeed3acea9471099a (diff)
downloadtalos-op-linux-b612a85792192b70e6497619521772c38ace758e.tar.gz
talos-op-linux-b612a85792192b70e6497619521772c38ace758e.zip
Merge branch 'next/soc' into next/multiplatform
* next/soc: (50 commits) ARM: OMAP: AM33xx hwmod: fixup SPI after platform_data move MAINTAINERS: add an entry for the BCM2835 ARM sub-architecture ARM: bcm2835: instantiate console UART ARM: bcm2835: add stub clock driver ARM: bcm2835: add system timer ARM: bcm2835: add interrupt controller driver ARM: add infra-structure for BCM2835 and Raspberry Pi ARM: tegra20: add CPU hotplug support ARM: tegra30: add CPU hotplug support ARM: tegra: clean up the common assembly macros into sleep.h ARM: tegra: replace the CPU CAR access code by tegra_cpu_car_ops ARM: tegra: introduce tegra_cpu_car_ops structures ARM: Tegra: Add smp_twd clock for Tegra20 ARM: AM33XX: clock: Add dcan clock aliases for device-tree ARM: OMAP2+: dpll: Add missing soc_is_am33xx() check for common functions ARM: OMAP: omap_device: idle devices with no driver bound ARM: OMAP: omap_device: don't attempt late suspend if no driver bound ARM: OMAP: omap_device: keep track of driver bound status ARM: OMAP3+: hwmod: Add AM33XX HWMOD data ARM: OMAP2+: hwmod: Hook-up am33xx support in omap_hwmod framework ... Change/remove conflict in arch/arm/mach-ux500/clock.c resolved. Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/plat-mxc/ssi-fiq.S')
-rw-r--r--arch/arm/plat-mxc/ssi-fiq.S89
1 files changed, 50 insertions, 39 deletions
diff --git a/arch/arm/plat-mxc/ssi-fiq.S b/arch/arm/plat-mxc/ssi-fiq.S
index 8397a2dd19f2..a8b93c5f29b5 100644
--- a/arch/arm/plat-mxc/ssi-fiq.S
+++ b/arch/arm/plat-mxc/ssi-fiq.S
@@ -34,91 +34,98 @@
.global imx_ssi_fiq_rx_buffer
.global imx_ssi_fiq_tx_buffer
+/*
+ * imx_ssi_fiq_start is _intentionally_ not marked as a function symbol
+ * using ENDPROC(). imx_ssi_fiq_start and imx_ssi_fiq_end are used to
+ * mark the function body so that it can be copied to the FIQ vector in
+ * the vectors page. imx_ssi_fiq_start should only be called as the result
+ * of an FIQ: calling it directly will not work.
+ */
imx_ssi_fiq_start:
- ldr r12, imx_ssi_fiq_base
+ ldr r12, .L_imx_ssi_fiq_base
/* TX */
- ldr r11, imx_ssi_fiq_tx_buffer
+ ldr r13, .L_imx_ssi_fiq_tx_buffer
/* shall we send? */
- ldr r13, [r12, #SSI_SIER]
- tst r13, #SSI_SIER_TFE0_EN
+ ldr r11, [r12, #SSI_SIER]
+ tst r11, #SSI_SIER_TFE0_EN
beq 1f
/* TX FIFO empty? */
- ldr r13, [r12, #SSI_SISR]
- tst r13, #SSI_SISR_TFE0
+ ldr r11, [r12, #SSI_SISR]
+ tst r11, #SSI_SISR_TFE0
beq 1f
mov r10, #0x10000
sub r10, #1
and r10, r10, r8 /* r10: current buffer offset */
- add r11, r11, r10
+ add r13, r13, r10
- ldrh r13, [r11]
- strh r13, [r12, #SSI_STX0]
+ ldrh r11, [r13]
+ strh r11, [r12, #SSI_STX0]
- ldrh r13, [r11, #2]
- strh r13, [r12, #SSI_STX0]
+ ldrh r11, [r13, #2]
+ strh r11, [r12, #SSI_STX0]
- ldrh r13, [r11, #4]
- strh r13, [r12, #SSI_STX0]
+ ldrh r11, [r13, #4]
+ strh r11, [r12, #SSI_STX0]
- ldrh r13, [r11, #6]
- strh r13, [r12, #SSI_STX0]
+ ldrh r11, [r13, #6]
+ strh r11, [r12, #SSI_STX0]
add r10, #8
- lsr r13, r8, #16 /* r13: buffer size */
- cmp r10, r13
- lslgt r8, r13, #16
+ lsr r11, r8, #16 /* r11: buffer size */
+ cmp r10, r11
+ lslgt r8, r11, #16
addle r8, #8
1:
/* RX */
/* shall we receive? */
- ldr r13, [r12, #SSI_SIER]
- tst r13, #SSI_SIER_RFF0_EN
+ ldr r11, [r12, #SSI_SIER]
+ tst r11, #SSI_SIER_RFF0_EN
beq 1f
/* RX FIFO full? */
- ldr r13, [r12, #SSI_SISR]
- tst r13, #SSI_SISR_RFF0
+ ldr r11, [r12, #SSI_SISR]
+ tst r11, #SSI_SISR_RFF0
beq 1f
- ldr r11, imx_ssi_fiq_rx_buffer
+ ldr r13, .L_imx_ssi_fiq_rx_buffer
mov r10, #0x10000
sub r10, #1
and r10, r10, r9 /* r10: current buffer offset */
- add r11, r11, r10
+ add r13, r13, r10
- ldr r13, [r12, #SSI_SACNT]
- tst r13, #SSI_SACNT_AC97EN
+ ldr r11, [r12, #SSI_SACNT]
+ tst r11, #SSI_SACNT_AC97EN
- ldr r13, [r12, #SSI_SRX0]
- strh r13, [r11]
+ ldr r11, [r12, #SSI_SRX0]
+ strh r11, [r13]
- ldr r13, [r12, #SSI_SRX0]
- strh r13, [r11, #2]
+ ldr r11, [r12, #SSI_SRX0]
+ strh r11, [r13, #2]
/* dummy read to skip slot 12 */
- ldrne r13, [r12, #SSI_SRX0]
+ ldrne r11, [r12, #SSI_SRX0]
- ldr r13, [r12, #SSI_SRX0]
- strh r13, [r11, #4]
+ ldr r11, [r12, #SSI_SRX0]
+ strh r11, [r13, #4]
- ldr r13, [r12, #SSI_SRX0]
- strh r13, [r11, #6]
+ ldr r11, [r12, #SSI_SRX0]
+ strh r11, [r13, #6]
/* dummy read to skip slot 12 */
- ldrne r13, [r12, #SSI_SRX0]
+ ldrne r11, [r12, #SSI_SRX0]
add r10, #8
- lsr r13, r9, #16 /* r13: buffer size */
- cmp r10, r13
- lslgt r9, r13, #16
+ lsr r11, r9, #16 /* r11: buffer size */
+ cmp r10, r11
+ lslgt r9, r11, #16
addle r9, #8
1:
@@ -126,11 +133,15 @@ imx_ssi_fiq_start:
subs pc, lr, #4
.align
+.L_imx_ssi_fiq_base:
imx_ssi_fiq_base:
.word 0x0
+.L_imx_ssi_fiq_rx_buffer:
imx_ssi_fiq_rx_buffer:
.word 0x0
+.L_imx_ssi_fiq_tx_buffer:
imx_ssi_fiq_tx_buffer:
.word 0x0
+.L_imx_ssi_fiq_end:
imx_ssi_fiq_end:
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