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ARM: zynq: Enable big-endian 

Enable ARCH_SUPPORTS_BIG_ENDIAN in Kconfig.

zynq_secondary_trampoline is the first function
that is called on secondary CPU.
Reference:
"ARM: mcpm: fix big endian issue in mcpm startup code"
(sha1: 519ceb9fd1)

Fix early printk support. Based on:
"ARM: pl01x debug code endian fix"
(sha1: 76e3faf156)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2014-04-11 15:05:56 +02:00
parent 90a6695a2a
commit eb28d0bb85
3 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/include/debug/zynq.S
View File

@ -43,12 +43,14 @@
.macro waituart,rd,rx .macro waituart,rd,rx
1001: ldr \rd, [\rx, #UART_SR_OFFSET] 1001: ldr \rd, [\rx, #UART_SR_OFFSET]
ARM_BE8( rev \rd, \rd )
tst \rd, #UART_SR_TXEMPTY tst \rd, #UART_SR_TXEMPTY
beq 1001b beq 1001b
.endm .endm
.macro busyuart,rd,rx .macro busyuart,rd,rx
1002: ldr \rd, [\rx, #UART_SR_OFFSET] @ get status register 1002: ldr \rd, [\rx, #UART_SR_OFFSET] @ get status register
ARM_BE8( rev \rd, \rd )
tst \rd, #UART_SR_TXFULL @ tst \rd, #UART_SR_TXFULL @
bne 1002b @ wait if FIFO is full bne 1002b @ wait if FIFO is full
.endm .endm

1
arch/arm/mach-zynq/Kconfig
View File

@ -2,6 +2,7 @@ config ARCH_ZYNQ
bool "Xilinx Zynq ARM Cortex A9 Platform" if ARCH_MULTI_V7 bool "Xilinx Zynq ARM Cortex A9 Platform" if ARCH_MULTI_V7
select ARCH_HAS_CPUFREQ select ARCH_HAS_CPUFREQ
select ARCH_HAS_OPP select ARCH_HAS_OPP
select ARCH_SUPPORTS_BIG_ENDIAN
select ARM_AMBA select ARM_AMBA
select ARM_GIC select ARM_GIC
select ARM_GLOBAL_TIMER if !CPU_FREQ select ARM_GLOBAL_TIMER if !CPU_FREQ

5
arch/arm/mach-zynq/headsmp.S
View File

@ -8,9 +8,12 @@
*/ */
#include <linux/linkage.h> #include <linux/linkage.h>
#include <linux/init.h> #include <linux/init.h>
#include <asm/assembler.h>
ENTRY(zynq_secondary_trampoline) ENTRY(zynq_secondary_trampoline)
ldr r0, [pc] ARM_BE8(setend be) @ ensure we are in BE8 mode
ldr r0, zynq_secondary_trampoline_jump
ARM_BE8(rev r0, r0)
bx r0 bx r0
.globl zynq_secondary_trampoline_jump .globl zynq_secondary_trampoline_jump
zynq_secondary_trampoline_jump: zynq_secondary_trampoline_jump: