187 lines
5.5 KiB
C
187 lines
5.5 KiB
C
|
/*
|
||
|
|
* Copyright 2004-2009 Analog Devices Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the GPL-2 or later.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __BFIN_ENTRY_H
|
||
|
|
#define __BFIN_ENTRY_H
|
||
|
|
|
||
|
|
#include <asm/setup.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
|
||
|
|
#ifdef __ASSEMBLY__
|
||
|
|
|
||
|
|
#define LFLUSH_I_AND_D 0x00000808
|
||
|
|
#define LSIGTRAP 5
|
||
|
|
|
||
|
|
/* process bits for task_struct.flags */
|
||
|
|
#define PF_TRACESYS_OFF 3
|
||
|
|
#define PF_TRACESYS_BIT 5
|
||
|
|
#define PF_PTRACED_OFF 3
|
||
|
|
#define PF_PTRACED_BIT 4
|
||
|
|
#define PF_DTRACE_OFF 1
|
||
|
|
#define PF_DTRACE_BIT 5
|
||
|
|
|
||
|
|
/*
|
||
|
|
* NOTE! The single-stepping code assumes that all interrupt handlers
|
||
|
|
* start by saving SYSCFG on the stack with their first instruction.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* This one is used for exceptions, emulation, and NMI. It doesn't push
|
||
|
|
RETI and doesn't do cli. */
|
||
|
|
#define SAVE_ALL_SYS save_context_no_interrupts
|
||
|
|
/* This is used for all normal interrupts. It saves a minimum of registers
|
||
|
|
to the stack, loads the IRQ number, and jumps to common code. */
|
||
|
|
#ifdef CONFIG_IPIPE
|
||
|
|
# define LOAD_IPIPE_IPEND \
|
||
|
|
P0.l = lo(IPEND); \
|
||
|
|
P0.h = hi(IPEND); \
|
||
|
|
R1 = [P0];
|
||
|
|
#else
|
||
|
|
# define LOAD_IPIPE_IPEND
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Workaround for anomalies 05000283 and 05000315
|
||
|
|
*/
|
||
|
|
#if ANOMALY_05000283 || ANOMALY_05000315
|
||
|
|
# define ANOMALY_283_315_WORKAROUND(preg, dreg) \
|
||
|
|
cc = dreg == dreg; \
|
||
|
|
preg.h = HI(CHIPID); \
|
||
|
|
preg.l = LO(CHIPID); \
|
||
|
|
if cc jump 1f; \
|
||
|
|
dreg.l = W[preg]; \
|
||
|
|
1:
|
||
|
|
#else
|
||
|
|
# define ANOMALY_283_315_WORKAROUND(preg, dreg)
|
||
|
|
#endif /* ANOMALY_05000283 || ANOMALY_05000315 */
|
||
|
|
|
||
|
|
#ifndef CONFIG_EXACT_HWERR
|
||
|
|
/* As a debugging aid - we save IPEND when DEBUG_KERNEL is on,
|
||
|
|
* otherwise it is a waste of cycles.
|
||
|
|
*/
|
||
|
|
# ifndef CONFIG_DEBUG_KERNEL
|
||
|
|
#define INTERRUPT_ENTRY(N) \
|
||
|
|
[--sp] = SYSCFG; \
|
||
|
|
[--sp] = P0; /*orig_p0*/ \
|
||
|
|
[--sp] = R0; /*orig_r0*/ \
|
||
|
|
[--sp] = (R7:0,P5:0); \
|
||
|
|
R0 = (N); \
|
||
|
|
LOAD_IPIPE_IPEND \
|
||
|
|
jump __common_int_entry;
|
||
|
|
# else /* CONFIG_DEBUG_KERNEL */
|
||
|
|
#define INTERRUPT_ENTRY(N) \
|
||
|
|
[--sp] = SYSCFG; \
|
||
|
|
[--sp] = P0; /*orig_p0*/ \
|
||
|
|
[--sp] = R0; /*orig_r0*/ \
|
||
|
|
[--sp] = (R7:0,P5:0); \
|
||
|
|
p0.l = lo(IPEND); \
|
||
|
|
p0.h = hi(IPEND); \
|
||
|
|
r1 = [p0]; \
|
||
|
|
R0 = (N); \
|
||
|
|
LOAD_IPIPE_IPEND \
|
||
|
|
jump __common_int_entry;
|
||
|
|
# endif /* CONFIG_DEBUG_KERNEL */
|
||
|
|
|
||
|
|
/* For timer interrupts, we need to save IPEND, since the user_mode
|
||
|
|
*macro accesses it to determine where to account time.
|
||
|
|
*/
|
||
|
|
#define TIMER_INTERRUPT_ENTRY(N) \
|
||
|
|
[--sp] = SYSCFG; \
|
||
|
|
[--sp] = P0; /*orig_p0*/ \
|
||
|
|
[--sp] = R0; /*orig_r0*/ \
|
||
|
|
[--sp] = (R7:0,P5:0); \
|
||
|
|
p0.l = lo(IPEND); \
|
||
|
|
p0.h = hi(IPEND); \
|
||
|
|
r1 = [p0]; \
|
||
|
|
R0 = (N); \
|
||
|
|
jump __common_int_entry;
|
||
|
|
#else /* CONFIG_EXACT_HWERR is defined */
|
||
|
|
|
||
|
|
/* if we want hardware error to be exact, we need to do a SSYNC (which forces
|
||
|
|
* read/writes to complete to the memory controllers), and check to see that
|
||
|
|
* caused a pending HW error condition. If so, we assume it was caused by user
|
||
|
|
* space, by setting the same interrupt that we are in (so it goes off again)
|
||
|
|
* and context restore, and a RTI (without servicing anything). This should
|
||
|
|
* cause the pending HWERR to fire, and when that is done, this interrupt will
|
||
|
|
* be re-serviced properly.
|
||
|
|
* As you can see by the code - we actually need to do two SSYNCS - one to
|
||
|
|
* make sure the read/writes complete, and another to make sure the hardware
|
||
|
|
* error is recognized by the core.
|
||
|
|
*
|
||
|
|
* The extra nop before the SSYNC is to make sure we work around 05000244,
|
||
|
|
* since the 283/315 workaround includes a branch to the end
|
||
|
|
*/
|
||
|
|
#define INTERRUPT_ENTRY(N) \
|
||
|
|
[--sp] = SYSCFG; \
|
||
|
|
[--sp] = P0; /*orig_p0*/ \
|
||
|
|
[--sp] = R0; /*orig_r0*/ \
|
||
|
|
[--sp] = (R7:0,P5:0); \
|
||
|
|
R1 = ASTAT; \
|
||
|
|
ANOMALY_283_315_WORKAROUND(p0, r0) \
|
||
|
|
P0.L = LO(ILAT); \
|
||
|
|
P0.H = HI(ILAT); \
|
||
|
|
NOP; \
|
||
|
|
SSYNC; \
|
||
|
|
SSYNC; \
|
||
|
|
R0 = [P0]; \
|
||
|
|
CC = BITTST(R0, EVT_IVHW_P); \
|
||
|
|
IF CC JUMP 1f; \
|
||
|
|
ASTAT = R1; \
|
||
|
|
p0.l = lo(IPEND); \
|
||
|
|
p0.h = hi(IPEND); \
|
||
|
|
r1 = [p0]; \
|
||
|
|
R0 = (N); \
|
||
|
|
LOAD_IPIPE_IPEND \
|
||
|
|
jump __common_int_entry; \
|
||
|
|
1: ASTAT = R1; \
|
||
|
|
RAISE N; \
|
||
|
|
(R7:0, P5:0) = [SP++]; \
|
||
|
|
SP += 0x8; \
|
||
|
|
SYSCFG = [SP++]; \
|
||
|
|
CSYNC; \
|
||
|
|
RTI;
|
||
|
|
|
||
|
|
#define TIMER_INTERRUPT_ENTRY(N) \
|
||
|
|
[--sp] = SYSCFG; \
|
||
|
|
[--sp] = P0; /*orig_p0*/ \
|
||
|
|
[--sp] = R0; /*orig_r0*/ \
|
||
|
|
[--sp] = (R7:0,P5:0); \
|
||
|
|
R1 = ASTAT; \
|
||
|
|
ANOMALY_283_315_WORKAROUND(p0, r0) \
|
||
|
|
P0.L = LO(ILAT); \
|
||
|
|
P0.H = HI(ILAT); \
|
||
|
|
NOP; \
|
||
|
|
SSYNC; \
|
||
|
|
SSYNC; \
|
||
|
|
R0 = [P0]; \
|
||
|
|
CC = BITTST(R0, EVT_IVHW_P); \
|
||
|
|
IF CC JUMP 1f; \
|
||
|
|
ASTAT = R1; \
|
||
|
|
p0.l = lo(IPEND); \
|
||
|
|
p0.h = hi(IPEND); \
|
||
|
|
r1 = [p0]; \
|
||
|
|
R0 = (N); \
|
||
|
|
jump __common_int_entry; \
|
||
|
|
1: ASTAT = R1; \
|
||
|
|
RAISE N; \
|
||
|
|
(R7:0, P5:0) = [SP++]; \
|
||
|
|
SP += 0x8; \
|
||
|
|
SYSCFG = [SP++]; \
|
||
|
|
CSYNC; \
|
||
|
|
RTI;
|
||
|
|
#endif /* CONFIG_EXACT_HWERR */
|
||
|
|
|
||
|
|
/* This one pushes RETI without using CLI. Interrupts are enabled. */
|
||
|
|
#define SAVE_CONTEXT_SYSCALL save_context_syscall
|
||
|
|
#define SAVE_CONTEXT save_context_with_interrupts
|
||
|
|
#define SAVE_CONTEXT_CPLB save_context_cplb
|
||
|
|
|
||
|
|
#define RESTORE_ALL_SYS restore_context_no_interrupts
|
||
|
|
#define RESTORE_CONTEXT restore_context_with_interrupts
|
||
|
|
#define RESTORE_CONTEXT_CPLB restore_context_cplb
|
||
|
|
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
#endif /* __BFIN_ENTRY_H */
|