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#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,%4\n"
" bis $31,%3,%1\n"
" stl_c %1,%2\n"
" beq %1,2f\n"
#ifdef CONFIG_SMP
" mb\n"
#endif
".subsection 2\n"
"2: br 1b\n"
".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,%4\n"
" bis $31,%3,%1\n"
" stq_c %1,%2\n"
" beq %1,2f\n"
#ifdef CONFIG_SMP
" mb\n"
#endif
".subsection 2\n"
"2: br 1b\n"
".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,%5\n"
" cmpeq %0,%3,%1\n"
" beq %1,2f\n"
" mov %4,%1\n"
" stl_c %1,%2\n"
" beq %1,3f\n"
#ifdef CONFIG_SMP
" mb\n"
#endif
"2:\n"
".subsection 2\n"
"3: br 1b\n"
".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,%5\n"
" cmpeq %0,%3,%1\n"
" beq %1,2f\n"
" mov %4,%1\n"
" stq_c %1,%2\n"
" beq %1,3f\n"
#ifdef CONFIG_SMP
" mb\n"
#endif
"2:\n"
".subsection 2\n"
"3: br 1b\n"
".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
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