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| author | Johannes Berg <johannes@sipsolutions.net> | 2016-01-27 17:59:36 +0100 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2016-02-02 06:31:19 +0100 |
| commit | 26e30c6489f4774492c168c7b953e575a16765f7 (patch) | |
| tree | 7d90e155b70e0c3eb1a3269a20d12acb0151071a | |
| parent | ARM: imx: use endian-safe readl/readw/writel/writew (diff) | |
| download | linux-26e30c6489f4774492c168c7b953e575a16765f7.tar.xz linux-26e30c6489f4774492c168c7b953e575a16765f7.zip | |
ARM: imx: enable big endian mode
Enable ARM big-endian mode on mach-imx. This requires adding some
byte swapping in the debug functions (which otherwise hang forever)
and of course the secondary core bringup.
Tested (on top of 4.4) on i.MX6 HummingBoard quad-core (IMX6Q).
The patch is pretty much as suggested by Arnd Bergmann, thanks!
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
| -rw-r--r-- | arch/arm/include/debug/imx.S | 3 | ||||
| -rw-r--r-- | arch/arm/mach-imx/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/headsmp.S | 2 |
3 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/include/debug/imx.S b/arch/arm/include/debug/imx.S index 619d8cc1ac12..92c44760d656 100644 --- a/arch/arm/include/debug/imx.S +++ b/arch/arm/include/debug/imx.S @@ -11,6 +11,7 @@ * */ +#include <asm/assembler.h> #include "imx-uart.h" /* @@ -34,6 +35,7 @@ .endm .macro senduart,rd,rx + ARM_BE8(rev \rd, \rd) str \rd, [\rx, #0x40] @ TXDATA .endm @@ -42,6 +44,7 @@ .macro busyuart,rd,rx 1002: ldr \rd, [\rx, #0x98] @ SR2 + ARM_BE8(rev \rd, \rd) tst \rd, #1 << 3 @ TXDC beq 1002b @ wait until transmit done .endm diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index da42fdf7470b..ecc374060c27 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -2,6 +2,7 @@ menuconfig ARCH_MXC bool "Freescale i.MX family" depends on ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7 || ARM_SINGLE_ARMV7M select ARCH_REQUIRE_GPIOLIB + select ARCH_SUPPORTS_BIG_ENDIAN select ARM_CPU_SUSPEND if PM select CLKSRC_IMX_GPT select GENERIC_IRQ_CHIP diff --git a/arch/arm/mach-imx/headsmp.S b/arch/arm/mach-imx/headsmp.S index b5e976816b63..6c28d28b3c64 100644 --- a/arch/arm/mach-imx/headsmp.S +++ b/arch/arm/mach-imx/headsmp.S @@ -12,6 +12,7 @@ #include <linux/linkage.h> #include <linux/init.h> +#include <asm/assembler.h> diag_reg_offset: .word g_diag_reg - . @@ -25,6 +26,7 @@ diag_reg_offset: .endm ENTRY(v7_secondary_startup) +ARM_BE8(setend be) @ go BE8 if entered LE set_diag_reg b secondary_startup ENDPROC(v7_secondary_startup) |