system.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:15k
- #ifndef __ALPHA_SYSTEM_H
- #define __ALPHA_SYSTEM_H
- #include <linux/config.h>
- #include <asm/pal.h>
- #include <asm/page.h>
- /*
- * System defines.. Note that this is included both from .c and .S
- * files, so it does only defines, not any C code.
- */
- /*
- * We leave one page for the initial stack page, and one page for
- * the initial process structure. Also, the console eats 3 MB for
- * the initial bootloader (one of which we can reclaim later).
- */
- #define BOOT_PCB 0x20000000
- #define BOOT_ADDR 0x20000000
- /* Remove when official MILO sources have ELF support: */
- #define BOOT_SIZE (16*1024)
- #ifdef CONFIG_ALPHA_LEGACY_START_ADDRESS
- #define KERNEL_START_PHYS 0x300000 /* Old bootloaders hardcoded this. */
- #else
- #define KERNEL_START_PHYS 0x800000 /* Wildfire has a huge console */
- #endif
- #define KERNEL_START (PAGE_OFFSET+KERNEL_START_PHYS)
- #define SWAPPER_PGD KERNEL_START
- #define INIT_STACK (PAGE_OFFSET+KERNEL_START_PHYS+0x02000)
- #define EMPTY_PGT (PAGE_OFFSET+KERNEL_START_PHYS+0x04000)
- #define EMPTY_PGE (PAGE_OFFSET+KERNEL_START_PHYS+0x08000)
- #define ZERO_PGE (PAGE_OFFSET+KERNEL_START_PHYS+0x0A000)
- #define START_ADDR (PAGE_OFFSET+KERNEL_START_PHYS+0x10000)
- /*
- * This is setup by the secondary bootstrap loader. Because
- * the zero page is zeroed out as soon as the vm system is
- * initialized, we need to copy things out into a more permanent
- * place.
- */
- #define PARAM ZERO_PGE
- #define COMMAND_LINE ((char*)(PARAM + 0x0000))
- #define COMMAND_LINE_SIZE 256
- #define INITRD_START (*(unsigned long *) (PARAM+0x100))
- #define INITRD_SIZE (*(unsigned long *) (PARAM+0x108))
- #ifndef __ASSEMBLY__
- #include <linux/kernel.h>
- /*
- * This is the logout header that should be common to all platforms
- * (assuming they are running OSF/1 PALcode, I guess).
- */
- struct el_common {
- unsigned int size; /* size in bytes of logout area */
- int sbz1 : 30; /* should be zero */
- int err2 : 1; /* second error */
- int retry : 1; /* retry flag */
- unsigned int proc_offset; /* processor-specific offset */
- unsigned int sys_offset; /* system-specific offset */
- unsigned long code; /* machine check code */
- };
- /* Machine Check Frame for uncorrectable errors (Large format)
- * --- This is used to log uncorrectable errors such as
- * double bit ECC errors.
- * --- These errors are detected by both processor and systems.
- */
- struct el_common_EV5_uncorrectable_mcheck {
- unsigned long shadow[8]; /* Shadow reg. 8-14, 25 */
- unsigned long paltemp[24]; /* PAL TEMP REGS. */
- unsigned long exc_addr; /* Address of excepting instruction*/
- unsigned long exc_sum; /* Summary of arithmetic traps. */
- unsigned long exc_mask; /* Exception mask (from exc_sum). */
- unsigned long pal_base; /* Base address for PALcode. */
- unsigned long isr; /* Interrupt Status Reg. */
- unsigned long icsr; /* CURRENT SETUP OF EV5 IBOX */
- unsigned long ic_perr_stat; /* I-CACHE Reg. <11> set Data parity
- <12> set TAG parity*/
- unsigned long dc_perr_stat; /* D-CACHE error Reg. Bits set to 1:
- <2> Data error in bank 0
- <3> Data error in bank 1
- <4> Tag error in bank 0
- <5> Tag error in bank 1 */
- unsigned long va; /* Effective VA of fault or miss. */
- unsigned long mm_stat; /* Holds the reason for D-stream
- fault or D-cache parity errors */
- unsigned long sc_addr; /* Address that was being accessed
- when EV5 detected Secondary cache
- failure. */
- unsigned long sc_stat; /* Helps determine if the error was
- TAG/Data parity(Secondary Cache)*/
- unsigned long bc_tag_addr; /* Contents of EV5 BC_TAG_ADDR */
- unsigned long ei_addr; /* Physical address of any transfer
- that is logged in EV5 EI_STAT */
- unsigned long fill_syndrome; /* For correcting ECC errors. */
- unsigned long ei_stat; /* Helps identify reason of any
- processor uncorrectable error
- at its external interface. */
- unsigned long ld_lock; /* Contents of EV5 LD_LOCK register*/
- };
- struct el_common_EV6_mcheck {
- unsigned int FrameSize; /* Bytes, including this field */
- unsigned int FrameFlags; /* <31> = Retry, <30> = Second Error */
- unsigned int CpuOffset; /* Offset to CPU-specific info */
- unsigned int SystemOffset; /* Offset to system-specific info */
- unsigned int MCHK_Code;
- unsigned int MCHK_Frame_Rev;
- unsigned long I_STAT; /* EV6 Internal Processor Registers */
- unsigned long DC_STAT; /* (See the 21264 Spec) */
- unsigned long C_ADDR;
- unsigned long DC1_SYNDROME;
- unsigned long DC0_SYNDROME;
- unsigned long C_STAT;
- unsigned long C_STS;
- unsigned long RESERVED0;
- unsigned long EXC_ADDR;
- unsigned long IER_CM;
- unsigned long ISUM;
- unsigned long MM_STAT;
- unsigned long PAL_BASE;
- unsigned long I_CTL;
- unsigned long PCTX;
- };
- extern void halt(void) __attribute__((noreturn));
- #define __halt() __asm__ __volatile__ ("call_pal %0 #halt" : : "i" (PAL_halt))
- #define prepare_to_switch() do { } while(0)
- #define switch_to(prev,next,last)
- do {
- unsigned long pcbb;
- current = (next);
- pcbb = virt_to_phys(¤t->thread);
- (last) = alpha_switch_to(pcbb, (prev));
- check_mmu_context();
- } while (0)
- extern struct task_struct* alpha_switch_to(unsigned long, struct task_struct*);
- #define mb()
- __asm__ __volatile__("mb": : :"memory")
- #define rmb()
- __asm__ __volatile__("mb": : :"memory")
- #define wmb()
- __asm__ __volatile__("wmb": : :"memory")
- #ifdef CONFIG_SMP
- #define smp_mb() mb()
- #define smp_rmb() rmb()
- #define smp_wmb() wmb()
- #else
- #define smp_mb() barrier()
- #define smp_rmb() barrier()
- #define smp_wmb() barrier()
- #endif
- #define set_mb(var, value)
- do { var = value; mb(); } while (0)
- #define set_wmb(var, value)
- do { var = value; wmb(); } while (0)
- #define imb()
- __asm__ __volatile__ ("call_pal %0 #imb" : : "i" (PAL_imb) : "memory")
- #define draina()
- __asm__ __volatile__ ("call_pal %0 #draina" : : "i" (PAL_draina) : "memory")
- enum implver_enum {
- IMPLVER_EV4,
- IMPLVER_EV5,
- IMPLVER_EV6
- };
- #ifdef CONFIG_ALPHA_GENERIC
- #define implver()
- ({ unsigned long __implver;
- __asm__ ("implver %0" : "=r"(__implver));
- (enum implver_enum) __implver; })
- #else
- /* Try to eliminate some dead code. */
- #ifdef CONFIG_ALPHA_EV4
- #define implver() IMPLVER_EV4
- #endif
- #ifdef CONFIG_ALPHA_EV5
- #define implver() IMPLVER_EV5
- #endif
- #if defined(CONFIG_ALPHA_EV6)
- #define implver() IMPLVER_EV6
- #endif
- #endif
- enum amask_enum {
- AMASK_BWX = (1UL << 0),
- AMASK_FIX = (1UL << 1),
- AMASK_MAX = (1UL << 8),
- AMASK_PRECISE_TRAP = (1UL << 9),
- };
- #define amask(mask)
- ({ unsigned long __amask, __input = (mask);
- __asm__ ("amask %1,%0" : "=r"(__amask) : "rI"(__input));
- __amask; })
- #define __CALL_PAL_R0(NAME, TYPE)
- static inline TYPE NAME(void)
- {
- register TYPE __r0 __asm__("$0");
- __asm__ __volatile__(
- "call_pal %1 # " #NAME
- :"=r" (__r0)
- :"i" (PAL_ ## NAME)
- :"$1", "$16", "$22", "$23", "$24", "$25");
- return __r0;
- }
- #define __CALL_PAL_W1(NAME, TYPE0)
- static inline void NAME(TYPE0 arg0)
- {
- register TYPE0 __r16 __asm__("$16") = arg0;
- __asm__ __volatile__(
- "call_pal %1 # "#NAME
- : "=r"(__r16)
- : "i"(PAL_ ## NAME), "0"(__r16)
- : "$1", "$22", "$23", "$24", "$25");
- }
- #define __CALL_PAL_W2(NAME, TYPE0, TYPE1)
- static inline void NAME(TYPE0 arg0, TYPE1 arg1)
- {
- register TYPE0 __r16 __asm__("$16") = arg0;
- register TYPE1 __r17 __asm__("$17") = arg1;
- __asm__ __volatile__(
- "call_pal %2 # "#NAME
- : "=r"(__r16), "=r"(__r17)
- : "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17)
- : "$1", "$22", "$23", "$24", "$25");
- }
- #define __CALL_PAL_RW1(NAME, RTYPE, TYPE0)
- static inline RTYPE NAME(TYPE0 arg0)
- {
- register RTYPE __r0 __asm__("$0");
- register TYPE0 __r16 __asm__("$16") = arg0;
- __asm__ __volatile__(
- "call_pal %2 # "#NAME
- : "=r"(__r16), "=r"(__r0)
- : "i"(PAL_ ## NAME), "0"(__r16)
- : "$1", "$22", "$23", "$24", "$25");
- return __r0;
- }
- #define __CALL_PAL_RW2(NAME, RTYPE, TYPE0, TYPE1)
- static inline RTYPE NAME(TYPE0 arg0, TYPE1 arg1)
- {
- register RTYPE __r0 __asm__("$0");
- register TYPE0 __r16 __asm__("$16") = arg0;
- register TYPE1 __r17 __asm__("$17") = arg1;
- __asm__ __volatile__(
- "call_pal %3 # "#NAME
- : "=r"(__r16), "=r"(__r17), "=r"(__r0)
- : "i"(PAL_ ## NAME), "0"(__r16), "1"(__r17)
- : "$1", "$22", "$23", "$24", "$25");
- return __r0;
- }
- __CALL_PAL_W1(cflush, unsigned long);
- __CALL_PAL_R0(rdmces, unsigned long);
- __CALL_PAL_R0(rdps, unsigned long);
- __CALL_PAL_R0(rdusp, unsigned long);
- __CALL_PAL_RW1(swpipl, unsigned long, unsigned long);
- __CALL_PAL_R0(whami, unsigned long);
- __CALL_PAL_W2(wrent, void*, unsigned long);
- __CALL_PAL_W1(wripir, unsigned long);
- __CALL_PAL_W1(wrkgp, unsigned long);
- __CALL_PAL_W1(wrmces, unsigned long);
- __CALL_PAL_RW2(wrperfmon, unsigned long, unsigned long, unsigned long);
- __CALL_PAL_W1(wrusp, unsigned long);
- __CALL_PAL_W1(wrvptptr, unsigned long);
- #define IPL_MIN 0
- #define IPL_SW0 1
- #define IPL_SW1 2
- #define IPL_DEV0 3
- #define IPL_DEV1 4
- #define IPL_TIMER 5
- #define IPL_PERF 6
- #define IPL_POWERFAIL 6
- #define IPL_MCHECK 7
- #define IPL_MAX 7
- #ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK
- #undef IPL_MIN
- #define IPL_MIN __min_ipl
- extern int __min_ipl;
- #endif
- #define getipl() (rdps() & 7)
- #define setipl(ipl) ((void) swpipl(ipl))
- #define __cli() do { setipl(IPL_MAX); barrier(); } while(0)
- #define __sti() do { barrier(); setipl(IPL_MIN); } while(0)
- #define __save_flags(flags) ((flags) = rdps())
- #define __save_and_cli(flags) do { (flags) = swpipl(IPL_MAX); barrier(); } while(0)
- #define __restore_flags(flags) do { barrier(); setipl(flags); barrier(); } while(0)
- #define local_irq_save(flags) __save_and_cli(flags)
- #define local_irq_restore(flags) __restore_flags(flags)
- #define local_irq_disable() __cli()
- #define local_irq_enable() __sti()
- #ifdef CONFIG_SMP
- extern int global_irq_holder;
- #define save_and_cli(flags) (save_flags(flags), cli())
- extern void __global_cli(void);
- extern void __global_sti(void);
- extern unsigned long __global_save_flags(void);
- extern void __global_restore_flags(unsigned long flags);
- #define cli() __global_cli()
- #define sti() __global_sti()
- #define save_flags(flags) ((flags) = __global_save_flags())
- #define restore_flags(flags) __global_restore_flags(flags)
- #else /* CONFIG_SMP */
- #define cli() __cli()
- #define sti() __sti()
- #define save_flags(flags) __save_flags(flags)
- #define save_and_cli(flags) __save_and_cli(flags)
- #define restore_flags(flags) __restore_flags(flags)
- #endif /* CONFIG_SMP */
- /*
- * TB routines..
- */
- #define __tbi(nr,arg,arg1...)
- ({
- register unsigned long __r16 __asm__("$16") = (nr);
- register unsigned long __r17 __asm__("$17"); arg;
- __asm__ __volatile__(
- "call_pal %3 #__tbi"
- :"=r" (__r16),"=r" (__r17)
- :"0" (__r16),"i" (PAL_tbi) ,##arg1
- :"$0", "$1", "$22", "$23", "$24", "$25");
- })
- #define tbi(x,y) __tbi(x,__r17=(y),"1" (__r17))
- #define tbisi(x) __tbi(1,__r17=(x),"1" (__r17))
- #define tbisd(x) __tbi(2,__r17=(x),"1" (__r17))
- #define tbis(x) __tbi(3,__r17=(x),"1" (__r17))
- #define tbiap() __tbi(-1, /* no second argument */)
- #define tbia() __tbi(-2, /* no second argument */)
- /*
- * Atomic exchange.
- * Since it can be used to implement critical sections
- * it must clobber "memory" (also for interrupts in UP).
- */
- extern __inline__ unsigned long
- __xchg_u32(volatile int *m, unsigned long val)
- {
- unsigned long dummy;
- __asm__ __volatile__(
- "1: ldl_l %0,%4n"
- " bis $31,%3,%1n"
- " stl_c %1,%2n"
- " beq %1,2fn"
- #ifdef CONFIG_SMP
- " mbn"
- #endif
- ".subsection 2n"
- "2: br 1bn"
- ".previous"
- : "=&r" (val), "=&r" (dummy), "=m" (*m)
- : "rI" (val), "m" (*m) : "memory");
- return val;
- }
- extern __inline__ unsigned long
- __xchg_u64(volatile long *m, unsigned long val)
- {
- unsigned long dummy;
- __asm__ __volatile__(
- "1: ldq_l %0,%4n"
- " bis $31,%3,%1n"
- " stq_c %1,%2n"
- " beq %1,2fn"
- #ifdef CONFIG_SMP
- " mbn"
- #endif
- ".subsection 2n"
- "2: br 1bn"
- ".previous"
- : "=&r" (val), "=&r" (dummy), "=m" (*m)
- : "rI" (val), "m" (*m) : "memory");
- return val;
- }
- /* This function doesn't exist, so you'll get a linker error
- if something tries to do an invalid xchg(). */
- extern void __xchg_called_with_bad_pointer(void);
- static __inline__ unsigned long
- __xchg(volatile void *ptr, unsigned long x, int size)
- {
- switch (size) {
- case 4:
- return __xchg_u32(ptr, x);
- case 8:
- return __xchg_u64(ptr, x);
- }
- __xchg_called_with_bad_pointer();
- return x;
- }
- #define xchg(ptr,x)
- ({
- __typeof__(*(ptr)) _x_ = (x);
- (__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, sizeof(*(ptr)));
- })
- #define tas(ptr) (xchg((ptr),1))
- /*
- * Atomic compare and exchange. Compare OLD with MEM, if identical,
- * store NEW in MEM. Return the initial value in MEM. Success is
- * indicated by comparing RETURN with OLD.
- *
- * The memory barrier should be placed in SMP only when we actually
- * make the change. If we don't change anything (so if the returned
- * prev is equal to old) then we aren't acquiring anything new and
- * we don't need any memory barrier as far I can tell.
- */
- #define __HAVE_ARCH_CMPXCHG 1
- extern __inline__ unsigned long
- __cmpxchg_u32(volatile int *m, int old, int new)
- {
- unsigned long prev, cmp;
- __asm__ __volatile__(
- "1: ldl_l %0,%5n"
- " cmpeq %0,%3,%1n"
- " beq %1,2fn"
- " mov %4,%1n"
- " stl_c %1,%2n"
- " beq %1,3fn"
- #ifdef CONFIG_SMP
- " mbn"
- #endif
- "2:n"
- ".subsection 2n"
- "3: br 1bn"
- ".previous"
- : "=&r"(prev), "=&r"(cmp), "=m"(*m)
- : "r"((long) old), "r"(new), "m"(*m) : "memory");
- return prev;
- }
- extern __inline__ unsigned long
- __cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
- {
- unsigned long prev, cmp;
- __asm__ __volatile__(
- "1: ldq_l %0,%5n"
- " cmpeq %0,%3,%1n"
- " beq %1,2fn"
- " mov %4,%1n"
- " stq_c %1,%2n"
- " beq %1,3fn"
- #ifdef CONFIG_SMP
- " mbn"
- #endif
- "2:n"
- ".subsection 2n"
- "3: br 1bn"
- ".previous"
- : "=&r"(prev), "=&r"(cmp), "=m"(*m)
- : "r"((long) old), "r"(new), "m"(*m) : "memory");
- return prev;
- }
- /* This function doesn't exist, so you'll get a linker error
- if something tries to do an invalid cmpxchg(). */
- extern void __cmpxchg_called_with_bad_pointer(void);
- static __inline__ unsigned long
- __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
- {
- switch (size) {
- case 4:
- return __cmpxchg_u32(ptr, old, new);
- case 8:
- return __cmpxchg_u64(ptr, old, new);
- }
- __cmpxchg_called_with_bad_pointer();
- return old;
- }
- #define cmpxchg(ptr,o,n)
- ({
- __typeof__(*(ptr)) _o_ = (o);
- __typeof__(*(ptr)) _n_ = (n);
- (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,
- (unsigned long)_n_, sizeof(*(ptr)));
- })
- #endif /* __ASSEMBLY__ */
- #endif