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-rw-r--r--arch/mips/include/asm/netlogic/haldefs.h92
1 files changed, 50 insertions, 42 deletions
diff --git a/arch/mips/include/asm/netlogic/haldefs.h b/arch/mips/include/asm/netlogic/haldefs.h
index 419d8ae..79c7ccc 100644
--- a/arch/mips/include/asm/netlogic/haldefs.h
+++ b/arch/mips/include/asm/netlogic/haldefs.h
@@ -35,42 +35,13 @@
#ifndef __NLM_HAL_HALDEFS_H__
#define __NLM_HAL_HALDEFS_H__
+#include <linux/irqflags.h> /* for local_irq_disable */
+
/*
* This file contains platform specific memory mapped IO implementation
* and will provide a way to read 32/64 bit memory mapped registers in
* all ABIs
*/
-#if !defined(CONFIG_64BIT) && defined(CONFIG_CPU_XLP)
-#error "o32 compile not supported on XLP yet"
-#endif
-/*
- * For o32 compilation, we have to disable interrupts and enable KX bit to
- * access 64 bit addresses or data.
- *
- * We need to disable interrupts because we save just the lower 32 bits of
- * registers in interrupt handling. So if we get hit by an interrupt while
- * using the upper 32 bits of a register, we lose.
- */
-static inline uint32_t nlm_save_flags_kx(void)
-{
- return change_c0_status(ST0_KX | ST0_IE, ST0_KX);
-}
-
-static inline uint32_t nlm_save_flags_cop2(void)
-{
- return change_c0_status(ST0_CU2 | ST0_IE, ST0_CU2);
-}
-
-static inline void nlm_restore_flags(uint32_t sr)
-{
- write_c0_status(sr);
-}
-
-/*
- * The n64 implementations are simple, the o32 implementations when they
- * are added, will have to disable interrupts and enable KX before doing
- * 64 bit ops.
- */
static inline uint32_t
nlm_read_reg(uint64_t base, uint32_t reg)
{
@@ -87,13 +58,40 @@ nlm_write_reg(uint64_t base, uint32_t reg, uint32_t val)
*addr = val;
}
+/*
+ * For o32 compilation, we have to disable interrupts to access 64 bit
+ * registers
+ *
+ * We need to disable interrupts because we save just the lower 32 bits of
+ * registers in interrupt handling. So if we get hit by an interrupt while
+ * using the upper 32 bits of a register, we lose.
+ */
+
static inline uint64_t
nlm_read_reg64(uint64_t base, uint32_t reg)
{
uint64_t addr = base + (reg >> 1) * sizeof(uint64_t);
volatile uint64_t *ptr = (volatile uint64_t *)(long)addr;
-
- return *ptr;
+ uint64_t val;
+
+ if (sizeof(unsigned long) == 4) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ __asm__ __volatile__(
+ ".set push" "\n\t"
+ ".set mips64" "\n\t"
+ "ld %L0, %1" "\n\t"
+ "dsra32 %M0, %L0, 0" "\n\t"
+ "sll %L0, %L0, 0" "\n\t"
+ ".set pop" "\n"
+ : "=r" (val)
+ : "m" (*ptr));
+ local_irq_restore(flags);
+ } else
+ val = *ptr;
+
+ return val;
}
static inline void
@@ -102,7 +100,25 @@ nlm_write_reg64(uint64_t base, uint32_t reg, uint64_t val)
uint64_t addr = base + (reg >> 1) * sizeof(uint64_t);
volatile uint64_t *ptr = (volatile uint64_t *)(long)addr;
- *ptr = val;
+ if (sizeof(unsigned long) == 4) {
+ unsigned long flags;
+ uint64_t tmp;
+
+ local_irq_save(flags);
+ __asm__ __volatile__(
+ ".set push" "\n\t"
+ ".set mips64" "\n\t"
+ "dsll32 %L0, %L0, 0" "\n\t"
+ "dsrl32 %L0, %L0, 0" "\n\t"
+ "dsll32 %M0, %M0, 0" "\n\t"
+ "or %L0, %L0, %M0" "\n\t"
+ "sd %L0, %2" "\n\t"
+ ".set pop" "\n"
+ : "=r" (tmp)
+ : "0" (val), "m" (*ptr));
+ local_irq_restore(flags);
+ } else
+ *ptr = val;
}
/*
@@ -143,14 +159,6 @@ nlm_pcicfg_base(uint32_t devoffset)
return nlm_io_base + devoffset;
}
-static inline uint64_t
-nlm_xkphys_map_pcibar0(uint64_t pcibase)
-{
- uint64_t paddr;
-
- paddr = nlm_read_reg(pcibase, 0x4) & ~0xfu;
- return (uint64_t)0x9000000000000000 | paddr;
-}
#elif defined(CONFIG_CPU_XLR)
static inline uint64_t
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