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[IA64] Sanitize assembler code for ia64_sal_os_state

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struct ia64_sal_os_state has three semi-independent sections.  The code
in mca_asm.S assumes that these three sections are contiguous, which
makes it very awkward to add new data to this structure.  Remove the
assumption that the sections are contiguous.  Define a macro to shorten
references to offsets in ia64_sal_os_state.

This patch does not change the way that the code behaves.  It just
makes it easier to update the code in future and to add fields to
ia64_sal_os_state when debugging the MCA/INIT handlers.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Keith Owens 2006-04-07 18:08:11 +10:00 committed by Tony Luck
parent b7bb575c3f
commit d270acbc24
4 changed files with 36 additions and 18 deletions
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16
arch/ia64/kernel/asm-offsets.c
View File

@ -217,16 +217,24 @@ void foo(void)
DEFINE(IA64_MCA_CPU_INIT_STACK_OFFSET,
offsetof (struct ia64_mca_cpu, init_stack));
BLANK();
DEFINE(IA64_SAL_OS_STATE_COMMON_OFFSET,
offsetof (struct ia64_sal_os_state, sal_ra));
DEFINE(IA64_SAL_OS_STATE_OS_GP_OFFSET,
offsetof (struct ia64_sal_os_state, os_gp));
DEFINE(IA64_SAL_OS_STATE_PAL_MIN_STATE_OFFSET,
offsetof (struct ia64_sal_os_state, pal_min_state));
DEFINE(IA64_SAL_OS_STATE_PROC_STATE_PARAM_OFFSET,
offsetof (struct ia64_sal_os_state, proc_state_param));
DEFINE(IA64_SAL_OS_STATE_SAL_RA_OFFSET,
offsetof (struct ia64_sal_os_state, sal_ra));
DEFINE(IA64_SAL_OS_STATE_SAL_GP_OFFSET,
offsetof (struct ia64_sal_os_state, sal_gp));
DEFINE(IA64_SAL_OS_STATE_PAL_MIN_STATE_OFFSET,
offsetof (struct ia64_sal_os_state, pal_min_state));
DEFINE(IA64_SAL_OS_STATE_OS_STATUS_OFFSET,
offsetof (struct ia64_sal_os_state, os_status));
DEFINE(IA64_SAL_OS_STATE_CONTEXT_OFFSET,
offsetof (struct ia64_sal_os_state, context));
DEFINE(IA64_SAL_OS_STATE_SIZE,
sizeof (struct ia64_sal_os_state));
BLANK();
DEFINE(IA64_PMSA_GR_OFFSET,
offsetof (struct pal_min_state_area_s, pmsa_gr));
DEFINE(IA64_PMSA_BANK1_GR_OFFSET,

1
arch/ia64/kernel/entry.h
View File

@ -23,6 +23,7 @@
#define PT(f) (IA64_PT_REGS_##f##_OFFSET)
#define SW(f) (IA64_SWITCH_STACK_##f##_OFFSET)
#define SOS(f) (IA64_SAL_OS_STATE_##f##_OFFSET)
#define PT_REGS_SAVES(off) \
.unwabi 3, 'i'; \

28
arch/ia64/kernel/mca_asm.S
View File

@ -159,7 +159,7 @@ ia64_os_mca_spin:
GET_IA64_MCA_DATA(r2)
// Using MCA stack, struct ia64_sal_os_state, variable proc_state_param
;;
add r3=IA64_MCA_CPU_MCA_STACK_OFFSET+MCA_SOS_OFFSET+IA64_SAL_OS_STATE_PROC_STATE_PARAM_OFFSET, r2
add r3=IA64_MCA_CPU_MCA_STACK_OFFSET+MCA_SOS_OFFSET+SOS(PROC_STATE_PARAM), r2
;;
ld8 r18=[r3] // Get processor state parameter on existing PALE_CHECK.
;;
@ -479,9 +479,11 @@ ia64_state_save:
st8 [temp2]=r11,16 // rv_rc
mov r11=cr.iipa
;;
st8 [temp1]=r18,16 // proc_state_param
st8 [temp2]=r19,16 // monarch
st8 [temp1]=r18 // proc_state_param
st8 [temp2]=r19 // monarch
mov r6=IA64_KR(CURRENT)
add temp1=SOS(SAL_RA), regs
add temp2=SOS(SAL_GP), regs
;;
st8 [temp1]=r12,16 // sal_ra
st8 [temp2]=r10,16 // sal_gp
@ -503,12 +505,14 @@ ia64_state_save:
st8 [temp2]=r11,16 // cr.iipa
mov r12=cr.iim
;;
st8 [temp1]=r12,16 // cr.iim
st8 [temp1]=r12 // cr.iim
(p1) mov r12=IA64_MCA_COLD_BOOT
(p2) mov r12=IA64_INIT_WARM_BOOT
mov r6=cr.iha
add temp1=SOS(OS_STATUS), regs
;;
st8 [temp2]=r6,16 // cr.iha
st8 [temp2]=r6 // cr.iha
add temp2=SOS(CONTEXT), regs
st8 [temp1]=r12 // os_status, default is cold boot
mov r6=IA64_MCA_SAME_CONTEXT
;;
@ -820,8 +824,8 @@ ia64_state_restore:
// Restore the SAL to OS state. The previous code left regs at pt_regs.
add regs=MCA_SOS_OFFSET-MCA_PT_REGS_OFFSET, regs
;;
add temp1=IA64_SAL_OS_STATE_COMMON_OFFSET, regs
add temp2=IA64_SAL_OS_STATE_COMMON_OFFSET+8, regs
add temp1=SOS(SAL_RA), regs
add temp2=SOS(SAL_GP), regs
;;
ld8 r12=[temp1],16 // sal_ra
ld8 r9=[temp2],16 // sal_gp
@ -842,8 +846,10 @@ ia64_state_restore:
;;
mov cr.itir=temp3
mov cr.iipa=temp4
ld8 temp3=[temp1],16 // cr.iim
ld8 temp4=[temp2],16 // cr.iha
ld8 temp3=[temp1] // cr.iim
ld8 temp4=[temp2] // cr.iha
add temp1=SOS(OS_STATUS), regs
add temp2=SOS(CONTEXT), regs
;;
mov cr.iim=temp3
mov cr.iha=temp4
@ -916,7 +922,7 @@ ia64_state_restore:
ia64_new_stack:
add regs=MCA_PT_REGS_OFFSET, r3
add temp2=MCA_SOS_OFFSET+IA64_SAL_OS_STATE_PAL_MIN_STATE_OFFSET, r3
add temp2=MCA_SOS_OFFSET+SOS(PAL_MIN_STATE), r3
mov b0=r2 // save return address
GET_IA64_MCA_DATA(temp1)
invala
@ -1020,7 +1026,7 @@ ia64_old_stack:
ia64_set_kernel_registers:
add temp3=MCA_SP_OFFSET, r3
add temp4=MCA_SOS_OFFSET+IA64_SAL_OS_STATE_OS_GP_OFFSET, r3
add temp4=MCA_SOS_OFFSET+SOS(OS_GP), r3
mov b0=r2 // save return address
GET_IA64_MCA_DATA(temp1)
;;

9
include/asm-ia64/mca.h
View File

@ -69,14 +69,16 @@ typedef struct ia64_mc_info_s {
*/
struct ia64_sal_os_state {
/* SAL to OS, must be at offset 0 */
/* SAL to OS */
u64 os_gp; /* GP of the os registered with the SAL, physical */
u64 pal_proc; /* PAL_PROC entry point, physical */
u64 sal_proc; /* SAL_PROC entry point, physical */
u64 rv_rc; /* MCA - Rendezvous state, INIT - reason code */
u64 proc_state_param; /* from R18 */
u64 monarch; /* 1 for a monarch event, 0 for a slave */
/* common, must follow SAL to OS */
/* common */
u64 sal_ra; /* Return address in SAL, physical */
u64 sal_gp; /* GP of the SAL - physical */
pal_min_state_area_t *pal_min_state; /* from R17. physical in asm, virtual in C */
@ -98,7 +100,8 @@ struct ia64_sal_os_state {
u64 iipa;
u64 iim;
u64 iha;
/* OS to SAL, must follow common */
/* OS to SAL */
u64 os_status; /* OS status to SAL, enum below */
u64 context; /* 0 if return to same context
1 if return to new context */