Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 390 insertions, 0 deletions

diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h
new file mode 100644
index 000000000000..b5731290b4e5
--- /dev/null
+++ b/include/asm-arm/system.h
@@ -0,0 +1,390 @@
+#ifndef __ASM_ARM_SYSTEM_H
+#define __ASM_ARM_SYSTEM_H
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+
+#define CPU_ARCH_UNKNOWN        0
+#define CPU_ARCH_ARMv3          1
+#define CPU_ARCH_ARMv4          2
+#define CPU_ARCH_ARMv4T         3
+#define CPU_ARCH_ARMv5          4
+#define CPU_ARCH_ARMv5T         5
+#define CPU_ARCH_ARMv5TE        6
+#define CPU_ARCH_ARMv5TEJ       7
+#define CPU_ARCH_ARMv6          8
+
+/*
+ * CR1 bits (CP#15 CR1)
+ */
+#define CR_M    (1 << 0)        /* MMU enable                           */
+#define CR_A    (1 << 1)        /* Alignment abort enable               */
+#define CR_C    (1 << 2)        /* Dcache enable                        */
+#define CR_W    (1 << 3)        /* Write buffer enable                  */
+#define CR_P    (1 << 4)        /* 32-bit exception handler             */
+#define CR_D    (1 << 5)        /* 32-bit data address range            */
+#define CR_L    (1 << 6)        /* Implementation defined               */
+#define CR_B    (1 << 7)        /* Big endian                           */
+#define CR_S    (1 << 8)        /* System MMU protection                */
+#define CR_R    (1 << 9)        /* ROM MMU protection                   */
+#define CR_F    (1 << 10)       /* Implementation defined               */
+#define CR_Z    (1 << 11)       /* Implementation defined               */
+#define CR_I    (1 << 12)       /* Icache enable                        */
+#define CR_V    (1 << 13)       /* Vectors relocated to 0xffff0000      */
+#define CR_RR   (1 << 14)       /* Round Robin cache replacement        */
+#define CR_L4   (1 << 15)       /* LDR pc can set T bit                 */
+#define CR_DT   (1 << 16)
+#define CR_IT   (1 << 18)
+#define CR_ST   (1 << 19)
+#define CR_FI   (1 << 21)       /* Fast interrupt (lower latency mode)  */
+#define CR_U    (1 << 22)       /* Unaligned access operation           */
+#define CR_XP   (1 << 23)       /* Extended page tables                 */
+#define CR_VE   (1 << 24)       /* Vectored interrupts                  */
+
+#define CPUID_ID        0
+#define CPUID_CACHETYPE 1
+#define CPUID_TCM       2
+#define CPUID_TLBTYPE   3
+
+#define read_cpuid(reg)                                                 \
+        ({                                                              \
+                unsigned int __val;                                     \
+                asm("mrc        p15, 0, %0, c0, c0, " __stringify(reg)  \
+                    : "=r" (__val)                                      \
+                    :                                                   \
+                    : "cc");                                            \
+                __val;                                                  \
+        })
+
+/*
+ * This is used to ensure the compiler did actually allocate the register we
+ * asked it for some inline assembly sequences.  Apparently we can't trust
+ * the compiler from one version to another so a bit of paranoia won't hurt.
+ * This string is meant to be concatenated with the inline asm string and
+ * will cause compilation to stop on mismatch.
+ * (for details, see gcc PR 15089)
+ */
+#define __asmeq(x, y)  ".ifnc " x "," y " ; .err ; .endif\n\t"
+
+#ifndef __ASSEMBLY__
+
+#include <linux/linkage.h>
+
+struct thread_info;
+struct task_struct;
+
+/* information about the system we're running on */
+extern unsigned int system_rev;
+extern unsigned int system_serial_low;
+extern unsigned int system_serial_high;
+extern unsigned int mem_fclk_21285;
+
+struct pt_regs;
+
+void die(const char *msg, struct pt_regs *regs, int err)
+                __attribute__((noreturn));
+
+void die_if_kernel(const char *str, struct pt_regs *regs, int err);
+
+void hook_fault_code(int nr, int (*fn)(unsigned long, unsigned int,
+                                       struct pt_regs *),
+                     int sig, const char *name);
+
+#include <asm/proc-fns.h>
+
+#define xchg(ptr,x) \
+        ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+
+#define tas(ptr) (xchg((ptr),1))
+
+extern asmlinkage void __backtrace(void);
+
+extern int cpu_architecture(void);
+
+#define set_cr(x)                                       \
+        __asm__ __volatile__(                           \
+        "mcr    p15, 0, %0, c1, c0, 0   @ set CR"       \
+        : : "r" (x) : "cc")
+
+#define get_cr()                                        \
+        ({                                              \
+        unsigned int __val;                             \
+        __asm__ __volatile__(                           \
+        "mrc    p15, 0, %0, c1, c0, 0   @ get CR"       \
+        : "=r" (__val) : : "cc");                       \
+        __val;                                          \
+        })
+
+extern unsigned long cr_no_alignment;   /* defined in entry-armv.S */
+extern unsigned long cr_alignment;      /* defined in entry-armv.S */
+
+#define UDBG_UNDEFINED  (1 << 0)
+#define UDBG_SYSCALL    (1 << 1)
+#define UDBG_BADABORT   (1 << 2)
+#define UDBG_SEGV       (1 << 3)
+#define UDBG_BUS        (1 << 4)
+
+extern unsigned int user_debug;
+
+#if __LINUX_ARM_ARCH__ >= 4
+#define vectors_high()  (cr_alignment & CR_V)
+#else
+#define vectors_high()  (0)
+#endif
+
+#define mb() __asm__ __volatile__ ("" : : : "memory")
+#define rmb() mb()
+#define wmb() mb()
+#define read_barrier_depends() do { } while(0)
+#define set_mb(var, value)  do { var = value; mb(); } while (0)
+#define set_wmb(var, value) do { var = value; wmb(); } while (0)
+#define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
+
+#ifdef CONFIG_SMP
+/*
+ * Define our own context switch locking.  This allows us to enable
+ * interrupts over the context switch, otherwise we end up with high
+ * interrupt latency.  The real problem area is switch_mm() which may
+ * do a full cache flush.
+ */
+#define prepare_arch_switch(rq,next)                                    \
+do {                                                                    \
+        spin_lock(&(next)->switch_lock);                                \
+        spin_unlock_irq(&(rq)->lock);                                   \
+} while (0)
+
+#define finish_arch_switch(rq,prev)                                     \
+        spin_unlock(&(prev)->switch_lock)
+
+#define task_running(rq,p)                                              \
+        ((rq)->curr == (p) || spin_is_locked(&(p)->switch_lock))
+#else
+/*
+ * Our UP-case is more simple, but we assume knowledge of how
+ * spin_unlock_irq() and friends are implemented.  This avoids
+ * us needlessly decrementing and incrementing the preempt count.
+ */
+#define prepare_arch_switch(rq,next)    local_irq_enable()
+#define finish_arch_switch(rq,prev)     spin_unlock(&(rq)->lock)
+#define task_running(rq,p)              ((rq)->curr == (p))
+#endif
+
+/*
+ * switch_to(prev, next) should switch from task `prev' to `next'
+ * `prev' will never be the same as `next'.  schedule() itself
+ * contains the memory barrier to tell GCC not to cache `current'.
+ */
+extern struct task_struct *__switch_to(struct task_struct *, struct thread_info *, struct thread_info *);
+
+#define switch_to(prev,next,last)                                       \
+do {                                                                    \
+        last = __switch_to(prev,prev->thread_info,next->thread_info);   \
+} while (0)
+
+/*
+ * CPU interrupt mask handling.
+ */
+#if __LINUX_ARM_ARCH__ >= 6
+
+#define local_irq_save(x)                                       \
+        ({                                                      \
+        __asm__ __volatile__(                                   \
+        "mrs    %0, cpsr                @ local_irq_save\n"     \
+        "cpsid  i"                                              \
+        : "=r" (x) : : "memory", "cc");                         \
+        })
+
+#define local_irq_enable()  __asm__("cpsie i    @ __sti" : : : "memory", "cc")
+#define local_irq_disable() __asm__("cpsid i    @ __cli" : : : "memory", "cc")
+#define local_fiq_enable()  __asm__("cpsie f    @ __stf" : : : "memory", "cc")
+#define local_fiq_disable() __asm__("cpsid f    @ __clf" : : : "memory", "cc")
+
+#else
+
+/*
+ * Save the current interrupt enable state & disable IRQs
+ */
+#define local_irq_save(x)                                       \
+        ({                                                      \
+                unsigned long temp;                             \
+                (void) (&temp == &x);                           \
+        __asm__ __volatile__(                                   \
+        "mrs    %0, cpsr                @ local_irq_save\n"     \
+"       orr     %1, %0, #128\n"                                 \
+"       msr     cpsr_c, %1"                                     \
+        : "=r" (x), "=r" (temp)                                 \
+        :                                                       \
+        : "memory", "cc");                                      \
+        })
+        
+/*
+ * Enable IRQs
+ */
+#define local_irq_enable()                                      \
+        ({                                                      \
+                unsigned long temp;                             \
+        __asm__ __volatile__(                                   \
+        "mrs    %0, cpsr                @ local_irq_enable\n"   \
+"       bic     %0, %0, #128\n"                                 \
+"       msr     cpsr_c, %0"                                     \
+        : "=r" (temp)                                           \
+        :                                                       \
+        : "memory", "cc");                                      \
+        })
+
+/*
+ * Disable IRQs
+ */
+#define local_irq_disable()                                     \
+        ({                                                      \
+                unsigned long temp;                             \
+        __asm__ __volatile__(                                   \
+        "mrs    %0, cpsr                @ local_irq_disable\n"  \
+"       orr     %0, %0, #128\n"                                 \
+"       msr     cpsr_c, %0"                                     \
+        : "=r" (temp)                                           \
+        :                                                       \
+        : "memory", "cc");                                      \
+        })
+
+/*
+ * Enable FIQs
+ */
+#define local_fiq_enable()                                      \
+        ({                                                      \
+                unsigned long temp;                             \
+        __asm__ __volatile__(                                   \
+        "mrs    %0, cpsr                @ stf\n"                \
+"       bic     %0, %0, #64\n"                                  \
+"       msr     cpsr_c, %0"                                     \
+        : "=r" (temp)                                           \
+        :                                                       \
+        : "memory", "cc");                                      \
+        })
+
+/*
+ * Disable FIQs
+ */
+#define local_fiq_disable()                                     \
+        ({                                                      \
+                unsigned long temp;                             \
+        __asm__ __volatile__(                                   \
+        "mrs    %0, cpsr                @ clf\n"                \
+"       orr     %0, %0, #64\n"                                  \
+"       msr     cpsr_c, %0"                                     \
+        : "=r" (temp)                                           \
+        :                                                       \
+        : "memory", "cc");                                      \
+        })
+
+#endif
+
+/*
+ * Save the current interrupt enable state.
+ */
+#define local_save_flags(x)                                     \
+        ({                                                      \
+        __asm__ __volatile__(                                   \
+        "mrs    %0, cpsr                @ local_save_flags"     \
+        : "=r" (x) : : "memory", "cc");                         \
+        })
+
+/*
+ * restore saved IRQ & FIQ state
+ */
+#define local_irq_restore(x)                                    \
+        __asm__ __volatile__(                                   \
+        "msr    cpsr_c, %0              @ local_irq_restore\n"  \
+        :                                                       \
+        : "r" (x)                                               \
+        : "memory", "cc")
+
+#define irqs_disabled()                 \
+({                                      \
+        unsigned long flags;            \
+        local_save_flags(flags);        \
+        flags & PSR_I_BIT;              \
+})
+
+#ifdef CONFIG_SMP
+#error SMP not supported
+
+#define smp_mb()                mb()
+#define smp_rmb()               rmb()
+#define smp_wmb()               wmb()
+#define smp_read_barrier_depends()              read_barrier_depends()
+
+#else
+
+#define smp_mb()                barrier()
+#define smp_rmb()               barrier()
+#define smp_wmb()               barrier()
+#define smp_read_barrier_depends()              do { } while(0)
+
+#if defined(CONFIG_CPU_SA1100) || defined(CONFIG_CPU_SA110)
+/*
+ * On the StrongARM, "swp" is terminally broken since it bypasses the
+ * cache totally.  This means that the cache becomes inconsistent, and,
+ * since we use normal loads/stores as well, this is really bad.
+ * Typically, this causes oopsen in filp_close, but could have other,
+ * more disasterous effects.  There are two work-arounds:
+ *  1. Disable interrupts and emulate the atomic swap
+ *  2. Clean the cache, perform atomic swap, flush the cache
+ *
+ * We choose (1) since its the "easiest" to achieve here and is not
+ * dependent on the processor type.
+ */
+#define swp_is_buggy
+#endif
+
+static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
+{
+        extern void __bad_xchg(volatile void *, int);
+        unsigned long ret;
+#ifdef swp_is_buggy
+        unsigned long flags;
+#endif
+
+        switch (size) {
+#ifdef swp_is_buggy
+                case 1:
+                        local_irq_save(flags);
+                        ret = *(volatile unsigned char *)ptr;
+                        *(volatile unsigned char *)ptr = x;
+                        local_irq_restore(flags);
+                        break;
+
+                case 4:
+                        local_irq_save(flags);
+                        ret = *(volatile unsigned long *)ptr;
+                        *(volatile unsigned long *)ptr = x;
+                        local_irq_restore(flags);
+                        break;
+#else
+                case 1: __asm__ __volatile__ ("swpb %0, %1, [%2]"
+                                        : "=&r" (ret)
+                                        : "r" (x), "r" (ptr)
+                                        : "memory", "cc");
+                        break;
+                case 4: __asm__ __volatile__ ("swp %0, %1, [%2]"
+                                        : "=&r" (ret)
+                                        : "r" (x), "r" (ptr)
+                                        : "memory", "cc");
+                        break;
+#endif
+                default: __bad_xchg(ptr, size), ret = 0;
+        }
+
+        return ret;
+}
+
+#endif /* CONFIG_SMP */
+
+#endif /* __ASSEMBLY__ */
+
+#define arch_align_stack(x) (x)
+
+#endif /* __KERNEL__ */
+
+#endif