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-rw-r--r--arch/xtensa/include/asm/checksum.h12
-rw-r--r--arch/xtensa/include/asm/gpio.h4
-rw-r--r--arch/xtensa/include/asm/hw_breakpoint.h58
-rw-r--r--arch/xtensa/include/asm/io.h16
-rw-r--r--arch/xtensa/include/asm/irqflags.h1
-rw-r--r--arch/xtensa/include/asm/pci.h3
-rw-r--r--arch/xtensa/include/asm/processor.h21
-rw-r--r--arch/xtensa/include/asm/regs.h3
-rw-r--r--arch/xtensa/include/asm/thread_info.h1
-rw-r--r--arch/xtensa/include/asm/timex.h9
-rw-r--r--arch/xtensa/include/asm/traps.h17
11 files changed, 110 insertions, 35 deletions
diff --git a/arch/xtensa/include/asm/checksum.h b/arch/xtensa/include/asm/checksum.h
index 0593de689..ec35074fc 100644
--- a/arch/xtensa/include/asm/checksum.h
+++ b/arch/xtensa/include/asm/checksum.h
@@ -123,9 +123,8 @@ static __inline__ __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
}
static __inline__ __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto,
- __wsum sum)
+ __u32 len, __u8 proto,
+ __wsum sum)
{
#ifdef __XTENSA_EL__
@@ -157,9 +156,8 @@ static __inline__ __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
* returns a 16-bit checksum, already complemented
*/
static __inline__ __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto,
- __wsum sum)
+ __u32 len, __u8 proto,
+ __wsum sum)
{
return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
}
@@ -177,7 +175,7 @@ static __inline__ __sum16 ip_compute_csum(const void *buff, int len)
#define _HAVE_ARCH_IPV6_CSUM
static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
const struct in6_addr *daddr,
- __u32 len, unsigned short proto,
+ __u32 len, __u8 proto,
__wsum sum)
{
unsigned int __dummy;
diff --git a/arch/xtensa/include/asm/gpio.h b/arch/xtensa/include/asm/gpio.h
deleted file mode 100644
index b3799d88f..000000000
--- a/arch/xtensa/include/asm/gpio.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef __LINUX_GPIO_H
-#warning Include linux/gpio.h instead of asm/gpio.h
-#include <linux/gpio.h>
-#endif
diff --git a/arch/xtensa/include/asm/hw_breakpoint.h b/arch/xtensa/include/asm/hw_breakpoint.h
new file mode 100644
index 000000000..dbe3053b2
--- /dev/null
+++ b/arch/xtensa/include/asm/hw_breakpoint.h
@@ -0,0 +1,58 @@
+/*
+ * Xtensa hardware breakpoints/watchpoints handling functions
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2016 Cadence Design Systems Inc.
+ */
+
+#ifndef __ASM_XTENSA_HW_BREAKPOINT_H
+#define __ASM_XTENSA_HW_BREAKPOINT_H
+
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+
+#include <linux/kdebug.h>
+#include <linux/types.h>
+#include <uapi/linux/hw_breakpoint.h>
+
+/* Breakpoint */
+#define XTENSA_BREAKPOINT_EXECUTE 0
+
+/* Watchpoints */
+#define XTENSA_BREAKPOINT_LOAD 1
+#define XTENSA_BREAKPOINT_STORE 2
+
+struct arch_hw_breakpoint {
+ unsigned long address;
+ u16 len;
+ u16 type;
+};
+
+struct perf_event;
+struct pt_regs;
+struct task_struct;
+
+int hw_breakpoint_slots(int type);
+int arch_check_bp_in_kernelspace(struct perf_event *bp);
+int arch_validate_hwbkpt_settings(struct perf_event *bp);
+int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
+ unsigned long val, void *data);
+
+int arch_install_hw_breakpoint(struct perf_event *bp);
+void arch_uninstall_hw_breakpoint(struct perf_event *bp);
+void hw_breakpoint_pmu_read(struct perf_event *bp);
+int check_hw_breakpoint(struct pt_regs *regs);
+void clear_ptrace_hw_breakpoint(struct task_struct *tsk);
+
+#else
+
+struct task_struct;
+
+static inline void clear_ptrace_hw_breakpoint(struct task_struct *tsk)
+{
+}
+
+#endif /* CONFIG_HAVE_HW_BREAKPOINT */
+#endif /* __ASM_XTENSA_HW_BREAKPOINT_H */
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index 74fed0b4e..c38e5a732 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -25,9 +25,12 @@
#ifdef CONFIG_MMU
+void __iomem *xtensa_ioremap_nocache(unsigned long addr, unsigned long size);
+void __iomem *xtensa_ioremap_cache(unsigned long addr, unsigned long size);
+void xtensa_iounmap(volatile void __iomem *addr);
+
/*
* Return the virtual address for the specified bus memory.
- * Note that we currently don't support any address outside the KIO segment.
*/
static inline void __iomem *ioremap_nocache(unsigned long offset,
unsigned long size)
@@ -36,7 +39,7 @@ static inline void __iomem *ioremap_nocache(unsigned long offset,
&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR);
else
- BUG();
+ return xtensa_ioremap_nocache(offset, size);
}
static inline void __iomem *ioremap_cache(unsigned long offset,
@@ -46,7 +49,7 @@ static inline void __iomem *ioremap_cache(unsigned long offset,
&& offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE)
return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR);
else
- BUG();
+ return xtensa_ioremap_cache(offset, size);
}
#define ioremap_cache ioremap_cache
@@ -60,6 +63,13 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
static inline void iounmap(volatile void __iomem *addr)
{
+ unsigned long va = (unsigned long) addr;
+
+ if (!(va >= XCHAL_KIO_CACHED_VADDR &&
+ va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) &&
+ !(va >= XCHAL_KIO_BYPASS_VADDR &&
+ va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE))
+ xtensa_iounmap(addr);
}
#define virt_to_bus virt_to_phys
diff --git a/arch/xtensa/include/asm/irqflags.h b/arch/xtensa/include/asm/irqflags.h
index 8e090c709..407606e57 100644
--- a/arch/xtensa/include/asm/irqflags.h
+++ b/arch/xtensa/include/asm/irqflags.h
@@ -13,6 +13,7 @@
#define _XTENSA_IRQFLAGS_H
#include <linux/types.h>
+#include <asm/processor.h>
static inline unsigned long arch_local_save_flags(void)
{
diff --git a/arch/xtensa/include/asm/pci.h b/arch/xtensa/include/asm/pci.h
index e438a00fb..5d6bd932b 100644
--- a/arch/xtensa/include/asm/pci.h
+++ b/arch/xtensa/include/asm/pci.h
@@ -55,9 +55,6 @@ int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
#endif /* __KERNEL__ */
-/* Implement the pci_ DMA API in terms of the generic device dma_ one */
-#include <asm-generic/pci-dma-compat.h>
-
/* Generic PCI */
#include <asm-generic/pci.h>
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index 83e2e4bc0..d2e40d39c 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -78,22 +78,20 @@
#define XTENSA_INTLEVEL_MASK(level) _XTENSA_INTLEVEL_MASK(level)
#define _XTENSA_INTLEVEL_MASK(level) (XCHAL_INTLEVEL##level##_MASK)
-#define IS_POW2(v) (((v) & ((v) - 1)) == 0)
+#define XTENSA_INTLEVEL_ANDBELOW_MASK(l) _XTENSA_INTLEVEL_ANDBELOW_MASK(l)
+#define _XTENSA_INTLEVEL_ANDBELOW_MASK(l) (XCHAL_INTLEVEL##l##_ANDBELOW_MASK)
#define PROFILING_INTLEVEL XTENSA_INT_LEVEL(XCHAL_PROFILING_INTERRUPT)
/* LOCKLEVEL defines the interrupt level that masks all
* general-purpose interrupts.
*/
-#if defined(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) && \
- defined(XCHAL_PROFILING_INTERRUPT) && \
- PROFILING_INTLEVEL == XCHAL_EXCM_LEVEL && \
- XCHAL_EXCM_LEVEL > 1 && \
- IS_POW2(XTENSA_INTLEVEL_MASK(PROFILING_INTLEVEL))
-#define LOCKLEVEL (XCHAL_EXCM_LEVEL - 1)
+#if defined(CONFIG_XTENSA_FAKE_NMI) && defined(XCHAL_PROFILING_INTERRUPT)
+#define LOCKLEVEL (PROFILING_INTLEVEL - 1)
#else
#define LOCKLEVEL XCHAL_EXCM_LEVEL
#endif
+
#define TOPLEVEL XCHAL_EXCM_LEVEL
#define XTENSA_FAKE_NMI (LOCKLEVEL < TOPLEVEL)
@@ -132,11 +130,10 @@ struct thread_struct {
unsigned long bad_vaddr; /* last user fault */
unsigned long bad_uaddr; /* last kernel fault accessing user space */
unsigned long error_code;
-
- unsigned long ibreak[XCHAL_NUM_IBREAK];
- unsigned long dbreaka[XCHAL_NUM_DBREAK];
- unsigned long dbreakc[XCHAL_NUM_DBREAK];
-
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+ struct perf_event *ptrace_bp[XCHAL_NUM_IBREAK];
+ struct perf_event *ptrace_wp[XCHAL_NUM_DBREAK];
+#endif
/* Make structure 16 bytes aligned. */
int align[0] __attribute__ ((aligned(16)));
};
diff --git a/arch/xtensa/include/asm/regs.h b/arch/xtensa/include/asm/regs.h
index 4ba9f516b..881a1134a 100644
--- a/arch/xtensa/include/asm/regs.h
+++ b/arch/xtensa/include/asm/regs.h
@@ -28,6 +28,7 @@
/* Special registers. */
#define SREG_MR 32
+#define SREG_IBREAKENABLE 96
#define SREG_IBREAKA 128
#define SREG_DBREAKA 144
#define SREG_DBREAKC 160
@@ -103,6 +104,8 @@
/* DEBUGCAUSE register fields. */
+#define DEBUGCAUSE_DBNUM_MASK 0xf00
+#define DEBUGCAUSE_DBNUM_SHIFT 8 /* First bit of DBNUM field */
#define DEBUGCAUSE_DEBUGINT_BIT 5 /* External debug interrupt */
#define DEBUGCAUSE_BREAKN_BIT 4 /* BREAK.N instruction */
#define DEBUGCAUSE_BREAK_BIT 3 /* BREAK instruction */
diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h
index 9ad12c617..7be2400f7 100644
--- a/arch/xtensa/include/asm/thread_info.h
+++ b/arch/xtensa/include/asm/thread_info.h
@@ -111,6 +111,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
+#define TIF_DB_DISABLED 8 /* debug trap disabled for syscall */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
diff --git a/arch/xtensa/include/asm/timex.h b/arch/xtensa/include/asm/timex.h
index ca929e6a3..f9b389d4e 100644
--- a/arch/xtensa/include/asm/timex.h
+++ b/arch/xtensa/include/asm/timex.h
@@ -12,19 +12,16 @@
#include <asm/processor.h>
#include <linux/stringify.h>
-#define _INTLEVEL(x) XCHAL_INT ## x ## _LEVEL
-#define INTLEVEL(x) _INTLEVEL(x)
-
#if XCHAL_NUM_TIMERS > 0 && \
- INTLEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL
+ XTENSA_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL
# define LINUX_TIMER 0
# define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT
#elif XCHAL_NUM_TIMERS > 1 && \
- INTLEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL
+ XTENSA_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL
# define LINUX_TIMER 1
# define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT
#elif XCHAL_NUM_TIMERS > 2 && \
- INTLEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL
+ XTENSA_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL
# define LINUX_TIMER 2
# define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT
#else
diff --git a/arch/xtensa/include/asm/traps.h b/arch/xtensa/include/asm/traps.h
index 28f33a8b7..2e69aa4b8 100644
--- a/arch/xtensa/include/asm/traps.h
+++ b/arch/xtensa/include/asm/traps.h
@@ -65,4 +65,21 @@ static inline void spill_registers(void)
#endif
}
+struct debug_table {
+ /* Pointer to debug exception handler */
+ void (*debug_exception)(void);
+ /* Temporary register save area */
+ unsigned long debug_save[1];
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+ /* Save area for DBREAKC registers */
+ unsigned long dbreakc_save[XCHAL_NUM_DBREAK];
+ /* Saved ICOUNT register */
+ unsigned long icount_save;
+ /* Saved ICOUNTLEVEL register */
+ unsigned long icount_level_save;
+#endif
+};
+
+void debug_exception(void);
+
#endif /* _XTENSA_TRAPS_H */