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/* asmmacro.h: Assembler macros.
*
* Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu)
*/
#ifndef _SPARC_ASMMACRO_H
#define _SPARC_ASMMACRO_H
/* #define SMP_DEBUG */
#define GET_PROCESSOR_ID(reg) \
rd %tbr, %reg; \
srl %reg, 12, %reg; \
and %reg, 3, %reg;
#define GET_PROCESSOR_MID(reg, tmp) \
GET_PROCESSOR_ID(reg) \
set C_LABEL(mid_xlate), %tmp; \
ldub [%tmp + %reg], %reg;
#define GET_PROCESSOR_OFFSET(reg) \
rd %tbr, %reg; \
srl %reg, 10, %reg; \
and %reg, 0xc, %reg;
#define PROCESSOR_OFFSET_TO_ID(reg) \
srl %reg, 2, %reg;
#define PROCESSOR_ID_TO_OFFSET(reg) \
sll %reg, 2, %reg;
/* All trap entry points _must_ begin with this macro or else you
* lose. It makes sure the kernel has a proper window so that
* c-code can be called.
*/
#ifndef SMP_DEBUG
#define SAVE_ALL \
sethi %hi(trap_setup), %l4; \
jmpl %l4 + %lo(trap_setup), %l6; \
nop;
#else
#define SAVE_ALL \
GET_PROCESSOR_ID(l4); \
set C_LABEL(trap_log), %l5; \
sll %l4, 11, %l6; \
add %l5, %l6, %l5; \
set C_LABEL(trap_log_ent), %l6; \
sll %l4, 2, %l4; \
add %l6, %l4, %l6; \
ld [%l6], %l6; \
sll %l6, 3, %l6; \
st %l1, [%l5 + %l6]; \
add %l5, 4, %l5; \
st %l0, [%l5 + %l6]; \
set C_LABEL(trap_log_ent), %l5; \
add %l5, %l4, %l5; \
srl %l6, 3, %l6; \
add %l6, 1, %l6; \
and %l6, 255, %l6; \
st %l6, [%l5]; \
sethi %hi(trap_setup), %l4; \
jmpl %l4 + %lo(trap_setup), %l6; \
nop;
#endif
/* All traps low-level code here must end with this macro.
* For SMP configurations the ret_trap_entry routine will
* have to appropriate code to actually release the kernel
* entry lock.
*/
#define RESTORE_ALL \
b ret_trap_entry; \
nop;
#ifndef __SMP__
#define ENTER_SYSCALL
#define LEAVE_SYSCALL
#define ENTER_IRQ
#define LEAVE_IRQ
#else
#define INCREMENT_COUNTER(symbol, tmp1, tmp2) \
set C_LABEL(symbol), %tmp1; \
ld [%tmp1], %tmp2; \
add %tmp2, 1, %tmp2; \
st %tmp2, [%tmp1];
#define DECREMENT_COUNTER(symbol, tmp1, tmp2) \
set C_LABEL(symbol), %tmp1; \
ld [%tmp1], %tmp2; \
sub %tmp2, 1, %tmp2; \
st %tmp2, [%tmp1];
/* This is so complicated I suggest you don't look at it. */
#define ENTER_MASK(mask) \
GET_PROCESSOR_OFFSET(l4) \
set C_LABEL(smp_spinning), %l6; \
add %l6, %l4, %l6; \
mov 1, %l5; \
st %l5, [%l6]; \
set C_LABEL(smp_proc_in_lock), %l5; \
ld [%l5 + %l4], %l6; \
or %l6, mask, %l6; \
st %l6, [%l5 + %l4]; \
1: \
set C_LABEL(kernel_flag), %l5; \
ldstub [%l5], %l6; \
cmp %l6, 0; \
be 3f; \
nop; \
set C_LABEL(active_kernel_processor), %l5; \
GET_PROCESSOR_ID(l4) \
ldub [%l5], %l6; \
cmp %l6, %l4; \
be 4f; \
nop; \
2: \
GET_PROCESSOR_MID(l4, l5) \
set C_LABEL(sun4m_interrupts), %l5; \
ld [%l5], %l5; \
sll %l4, 12, %l4; \
add %l5, %l4, %l5; \
ld [%l5], %l4; \
sethi %hi(0x80000000), %l6; \
andcc %l6, %l4, %g0; \
be 5f; \
nop; \
st %l6, [%l5 + 4]; \
nop; nop; nop; \
ld [%l5], %g0; \
nop; nop; nop; \
or %l0, PSR_PIL, %l4; \
wr %l4, 0x0, %psr; \
nop; nop; nop; \
wr %l4, PSR_ET, %psr; \
nop; nop; nop; \
call C_LABEL(smp_message_irq); \
nop; \
wr %l0, 0x0, %psr; \
nop; nop; nop; \
5: \
set C_LABEL(kernel_flag), %l5; \
ldub [%l5], %l6; \
cmp %l6, 0; \
bne 2b; \
nop; \
b 1b; \
nop; \
3: \
GET_PROCESSOR_ID(l4) \
set C_LABEL(active_kernel_processor), %l5; \
stb %l4, [%l5]; \
GET_PROCESSOR_MID(l4, l5) \
set C_LABEL(irq_rcvreg), %l5; \
ld [%l5], %l5; \
st %l4, [%l5]; \
4: \
GET_PROCESSOR_OFFSET(l4) \
set C_LABEL(smp_spinning), %l6; \
st %g0, [%l6 + %l4];
#define ENTER_SYSCALL \
ENTER_MASK(SMP_FROM_SYSCALL) \
INCREMENT_COUNTER(kernel_counter, l6, l5) \
INCREMENT_COUNTER(syscall_count, l6, l5)
#define ENTER_IRQ \
ENTER_MASK(SMP_FROM_INT) \
INCREMENT_COUNTER(kernel_counter, l6, l5)
#define LEAVE_MASK(mask) \
GET_PROCESSOR_OFFSET(l4) \
set C_LABEL(smp_proc_in_lock), %l5; \
ld [%l5 + %l4], %l6; \
andn %l6, mask, %l6; \
st %l6, [%l5 + %l4];
#define LEAVE_SYSCALL \
LEAVE_MASK(SMP_FROM_SYSCALL) \
DECREMENT_COUNTER(syscall_count, l6, l5) \
set C_LABEL(kernel_counter), %l6; \
ld [%l6], %l5; \
subcc %l5, 1, %l5; \
st %l5, [%l6]; \
bne 1f; \
nop; \
set C_LABEL(active_kernel_processor), %l6; \
mov NO_PROC_ID, %l5; \
stb %l5, [%l6]; \
set C_LABEL(kernel_flag), %l6; \
stb %g0, [%l6]; \
1:
#define LEAVE_IRQ \
LEAVE_MASK(SMP_FROM_INT) \
INCREMENT_COUNTER(syscall_count, l6, l5)
#define RESTORE_ALL_FASTIRQ \
b ret_irq_entry; \
nop;
#endif /* !(__SMP__) */
#endif /* !(_SPARC_ASMMACRO_H) */
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