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authorArnd Bergmann <arnd@arndb.de>2012-10-04 22:57:00 +0200
committerArnd Bergmann <arnd@arndb.de>2012-10-04 22:57:51 +0200
commitc37d6154c0b9163c27e53cc1d0be3867b4abd760 (patch)
tree7a24522c56d1cb284dff1d3c225bbdaba0901bb5 /arch/arm/plat-mxc/ssi-fiq.S
parente7a570ff7dff9af6e54ff5e580a61ec7652137a0 (diff)
parent8a1ab3155c2ac7fbe5f2038d6e26efeb607a1498 (diff)
downloadblackbird-op-linux-c37d6154c0b9163c27e53cc1d0be3867b4abd760.tar.gz
blackbird-op-linux-c37d6154c0b9163c27e53cc1d0be3867b4abd760.zip
Merge branch 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers into asm-generic
Patches from David Howells <dhowells@redhat.com>: This is to complete part of the UAPI disintegration for which the preparatory patches were pulled recently. Note that there are some fixup patches which are at the base of the branch aimed at you, plus all arches get the asm-generic branch merged in too. * 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers: UAPI: (Scripted) Disintegrate include/asm-generic UAPI: Fix conditional header installation handling (notably kvm_para.h on m68k) c6x: remove c6x signal.h UAPI: Split compound conditionals containing __KERNEL__ in Arm64 UAPI: Fix the guards on various asm/unistd.h files Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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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