microblaze: Add support for little-endian Microblaze
Microblaze little-endian toolchain exports __MICROBLAZEEL__
which is used in the kernel to identify little/big endian.
The most of the changes are in loading values from DTB which
is always big endian.
Little endian platforms are based on new AXI bus which has
impact to early uartlite initialization.
Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/include/asm/byteorder.h b/arch/microblaze/include/asm/byteorder.h
index ce9c587..3190276 100644
--- a/arch/microblaze/include/asm/byteorder.h
+++ b/arch/microblaze/include/asm/byteorder.h
@@ -1,6 +1,10 @@
#ifndef _ASM_MICROBLAZE_BYTEORDER_H
#define _ASM_MICROBLAZE_BYTEORDER_H
+#ifdef __MICROBLAZEEL__
+#include <linux/byteorder/little_endian.h>
+#else
#include <linux/byteorder/big_endian.h>
+#endif
#endif /* _ASM_MICROBLAZE_BYTEORDER_H */
diff --git a/arch/microblaze/include/asm/checksum.h b/arch/microblaze/include/asm/checksum.h
index 128bf03..0185cbe 100644
--- a/arch/microblaze/include/asm/checksum.h
+++ b/arch/microblaze/include/asm/checksum.h
@@ -24,8 +24,13 @@
"addc %0, %0, %3\n\t"
"addc %0, %0, r0\n\t"
: "+&d" (sum)
- : "d" (saddr), "d" (daddr), "d" (len + proto));
-
+ : "d" (saddr), "d" (daddr),
+#ifdef __MICROBLAZEEL__
+ "d" ((len + proto) << 8)
+#else
+ "d" (len + proto)
+#endif
+);
return sum;
}
diff --git a/arch/microblaze/include/asm/cpuinfo.h b/arch/microblaze/include/asm/cpuinfo.h
index 0d4f0ce..7fab800 100644
--- a/arch/microblaze/include/asm/cpuinfo.h
+++ b/arch/microblaze/include/asm/cpuinfo.h
@@ -98,7 +98,8 @@
static inline unsigned int fcpu(struct device_node *cpu, char *n)
{
int *val;
- return (val = (int *) of_get_property(cpu, n, NULL)) ? *val : 0;
+ return (val = (int *) of_get_property(cpu, n, NULL)) ?
+ be32_to_cpup(val) : 0;
}
#endif /* _ASM_MICROBLAZE_CPUINFO_H */
diff --git a/arch/microblaze/include/asm/elf.h b/arch/microblaze/include/asm/elf.h
index 732caf1..098dfdd 100644
--- a/arch/microblaze/include/asm/elf.h
+++ b/arch/microblaze/include/asm/elf.h
@@ -71,7 +71,7 @@
#define ELF_ET_DYN_BASE (0x08000000)
-#ifdef __LITTLE_ENDIAN__
+#ifdef __MICROBLAZEEL__
#define ELF_DATA ELFDATA2LSB
#else
#define ELF_DATA ELFDATA2MSB
diff --git a/arch/microblaze/include/asm/unaligned.h b/arch/microblaze/include/asm/unaligned.h
index 3658d91..2b97cbe 100644
--- a/arch/microblaze/include/asm/unaligned.h
+++ b/arch/microblaze/include/asm/unaligned.h
@@ -12,12 +12,18 @@
# ifdef __KERNEL__
-# include <linux/unaligned/be_struct.h>
+# include <linux/unaligned/be_byteshift.h>
# include <linux/unaligned/le_byteshift.h>
# include <linux/unaligned/generic.h>
-# define get_unaligned __get_unaligned_be
-# define put_unaligned __put_unaligned_be
+
+# ifdef __MICROBLAZEEL__
+# define get_unaligned __get_unaligned_le
+# define put_unaligned __put_unaligned_le
+# else
+# define get_unaligned __get_unaligned_be
+# define put_unaligned __put_unaligned_be
+# endif
# endif /* __KERNEL__ */
#endif /* _ASM_MICROBLAZE_UNALIGNED_H */
diff --git a/arch/microblaze/kernel/heartbeat.c b/arch/microblaze/kernel/heartbeat.c
index 5c24eb8..154756f 100644
--- a/arch/microblaze/kernel/heartbeat.c
+++ b/arch/microblaze/kernel/heartbeat.c
@@ -59,7 +59,7 @@
}
if (gpio) {
- base_addr = *(int *) of_get_property(gpio, "reg", NULL);
+ base_addr = be32_to_cpup(of_get_property(gpio, "reg", NULL));
base_addr = (unsigned long) ioremap(base_addr, PAGE_SIZE);
printk(KERN_NOTICE "Heartbeat GPIO at 0x%x\n", base_addr);
diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c
index e85bbea..d61ea33 100644
--- a/arch/microblaze/kernel/intc.c
+++ b/arch/microblaze/kernel/intc.c
@@ -138,12 +138,15 @@
}
BUG_ON(!intc);
- intc_baseaddr = *(int *) of_get_property(intc, "reg", NULL);
+ intc_baseaddr = be32_to_cpup(of_get_property(intc,
+ "reg", NULL));
intc_baseaddr = (unsigned long) ioremap(intc_baseaddr, PAGE_SIZE);
- nr_irq = *(int *) of_get_property(intc, "xlnx,num-intr-inputs", NULL);
+ nr_irq = be32_to_cpup(of_get_property(intc,
+ "xlnx,num-intr-inputs", NULL));
intr_type =
- *(int *) of_get_property(intc, "xlnx,kind-of-intr", NULL);
+ be32_to_cpup(of_get_property(intc,
+ "xlnx,kind-of-intr", NULL));
if (intr_type >= (1 << (nr_irq + 1)))
printk(KERN_INFO " ERROR: Mismatch in kind-of-intr param\n");
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c
index 608e5cf..04d3325 100644
--- a/arch/microblaze/kernel/prom.c
+++ b/arch/microblaze/kernel/prom.c
@@ -77,11 +77,12 @@
/* find compatible node with uartlite */
p = of_get_flat_dt_prop(node, "compatible", &l);
if ((strncmp(p, "xlnx,xps-uartlite", 17) != 0) &&
- (strncmp(p, "xlnx,opb-uartlite", 17) != 0))
+ (strncmp(p, "xlnx,opb-uartlite", 17) != 0) &&
+ (strncmp(p, "xlnx,axi-uartlite", 17) != 0))
return 0;
addr = of_get_flat_dt_prop(node, "reg", &l);
- return *addr; /* return address */
+ return be32_to_cpup(addr); /* return address */
}
/* this function is looking for early uartlite console - Microblaze specific */
@@ -115,7 +116,7 @@
addr = *(u32 *)of_get_flat_dt_prop(node, "reg", &l);
addr += *(u32 *)of_get_flat_dt_prop(node, "reg-offset", &l);
- return addr; /* return address */
+ return be32_to_cpu(addr); /* return address */
}
/* this function is looking for early uartlite console - Microblaze specific */
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index 64ca14d..fcb97e8 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -270,11 +270,11 @@
}
BUG_ON(!timer);
- timer_baseaddr = *(int *) of_get_property(timer, "reg", NULL);
+ timer_baseaddr = be32_to_cpup(of_get_property(timer, "reg", NULL));
timer_baseaddr = (unsigned long) ioremap(timer_baseaddr, PAGE_SIZE);
- irq = *(int *) of_get_property(timer, "interrupts", NULL);
- timer_num =
- *(int *) of_get_property(timer, "xlnx,one-timer-only", NULL);
+ irq = be32_to_cpup(of_get_property(timer, "interrupts", NULL));
+ timer_num = be32_to_cpup(of_get_property(timer,
+ "xlnx,one-timer-only", NULL));
if (timer_num) {
eprintk(KERN_EMERG "Please enable two timers in HW\n");
BUG();
diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
index 20b0552..96a88c3 100644
--- a/arch/microblaze/kernel/vmlinux.lds.S
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -15,7 +15,11 @@
#include <asm-generic/vmlinux.lds.h>
#include <asm/thread_info.h>
+#ifdef __MICROBLAZEEL__
+jiffies = jiffies_64;
+#else
jiffies = jiffies_64 + 4;
+#endif
SECTIONS {
. = CONFIG_KERNEL_START;