*/
#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
.macro clear_bip
- msrclr r11, MSR_BIP
+ msrclr r0, MSR_BIP
nop
.endm
.macro set_bip
- msrset r11, MSR_BIP
+ msrset r0, MSR_BIP
nop
.endm
.macro clear_eip
- msrclr r11, MSR_EIP
+ msrclr r0, MSR_EIP
nop
.endm
.macro set_ee
- msrset r11, MSR_EE
+ msrset r0, MSR_EE
nop
.endm
.macro disable_irq
- msrclr r11, MSR_IE
+ msrclr r0, MSR_IE
nop
.endm
.macro enable_irq
- msrset r11, MSR_IE
+ msrset r0, MSR_IE
nop
.endm
.macro set_ums
- msrset r11, MSR_UMS
+ msrset r0, MSR_UMS
nop
- msrclr r11, MSR_VMS
+ msrclr r0, MSR_VMS
nop
.endm
.macro set_vms
- msrclr r11, MSR_UMS
+ msrclr r0, MSR_UMS
nop
- msrset r11, MSR_VMS
+ msrset r0, MSR_VMS
+ nop
+ .endm
+
+ .macro clear_ums
+ msrclr r0, MSR_UMS
nop
.endm
.macro clear_vms_ums
- msrclr r11, MSR_VMS | MSR_UMS
+ msrclr r0, MSR_VMS | MSR_UMS
nop
.endm
#else
nop
.endm
+ .macro clear_ums
+ mfs r11, rmsr
+ nop
+ andni r11, r11, MSR_UMS
+ mts rmsr,r11
+ nop
+ .endm
+
.macro clear_vms_ums
mfs r11, rmsr
nop
lwi r30, r1, PTO+PT_R30; \
lwi r31, r1, PTO+PT_R31; /* Restore cur task reg */
+#define SAVE_STATE \
+ swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* save stack */ \
+ /* See if already in kernel mode.*/ \
+ mfs r1, rmsr; \
+ nop; \
+ andi r1, r1, MSR_UMS; \
+ bnei r1, 1f; \
+ /* Kernel-mode state save. */ \
+ /* Reload kernel stack-ptr. */ \
+ lwi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); \
+ /* FIXME: I can add these two lines to one */ \
+ /* tophys(r1,r1); */ \
+ /* addik r1, r1, -STATE_SAVE_SIZE; */ \
+ addik r1, r1, CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE; \
+ SAVE_REGS \
+ brid 2f; \
+ swi r1, r1, PTO+PT_MODE; \
+1: /* User-mode state save. */ \
+ lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\
+ tophys(r1,r1); \
+ lwi r1, r1, TS_THREAD_INFO; /* get the thread info */ \
+ /* MS these three instructions can be added to one */ \
+ /* addik r1, r1, THREAD_SIZE; */ \
+ /* tophys(r1,r1); */ \
+ /* addik r1, r1, -STATE_SAVE_SIZE; */ \
+ addik r1, r1, THREAD_SIZE + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START - STATE_SAVE_SIZE; \
+ SAVE_REGS \
+ lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \
+ swi r11, r1, PTO+PT_R1; /* Store user SP. */ \
+ swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */ \
+ /* MS: I am clearing UMS even in case when I come from kernel space */ \
+ clear_ums; \
+2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
+
.text
/*
C_ENTRY(_user_exception):
swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */
addi r14, r14, 4 /* return address is 4 byte after call */
- swi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* Save r11 */
- lwi r11, r0, TOPHYS(PER_CPU(KM));/* See if already in kernel mode.*/
- beqi r11, 1f; /* Jump ahead if coming from user */
-/* Kernel-mode state save. */
- lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
- tophys(r1,r11);
- swi r11, r1, (PT_R1-PT_SIZE); /* Save original SP. */
- lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */
+ mfs r1, rmsr
+ nop
+ andi r1, r1, MSR_UMS
+ bnei r1, 1f
+
+/* Kernel-mode state save - kernel execve */
+ lwi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
+ tophys(r1,r1);
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */
SAVE_REGS
- addi r11, r0, 1; /* Was in kernel-mode. */
- swi r11, r1, PTO+PT_MODE; /* pt_regs -> kernel mode */
+ swi r1, r1, PTO + PT_MODE; /* pt_regs -> kernel mode */
brid 2f;
nop; /* Fill delay slot */
/* User-mode state save. */
1:
- lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */
lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */
tophys(r1,r1);
lwi r1, r1, TS_THREAD_INFO; /* get stack from task_struct */
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */
SAVE_REGS
- swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */
+ swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */
lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
swi r11, r1, PTO+PT_R1; /* Store user SP. */
- addi r11, r0, 1;
- swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */
2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
/* Save away the syscall number. */
swi r12, r1, PTO+PT_R0;
# Find and jump into the syscall handler.
lwi r12, r12, sys_call_table
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
- la r15, r0, ret_from_trap-8
+ addi r15, r0, ret_from_trap-8
bra r12
/* The syscall number is invalid, return an error. */
5:
+ rtsd r15, 8; /* looks like a normal subroutine return */
addi r3, r0, -ENOSYS;
- rtsd r15,8; /* looks like a normal subroutine return */
- or r0, r0, r0
-
/* Entry point used to return from a syscall/trap */
/* We re-enable BIP bit before state restore */
C_ENTRY(ret_from_trap):
- set_bip; /* Ints masked for state restore*/
swi r3, r1, PTO + PT_R3
swi r4, r1, PTO + PT_R4
- lwi r11, r1, PTO+PT_MODE;
+ lwi r11, r1, PTO + PT_MODE;
/* See if returning to kernel mode, if so, skip resched &c. */
bnei r11, 2f;
/* We're returning to user mode, so check for various conditions that
andi r11, r11, _TIF_SIGPENDING;
beqi r11, 1f; /* Signals to handle, handle them */
- la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
+ addik r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
addi r7, r0, 1; /* Arg 3: int in_syscall */
bralid r15, do_signal; /* Handle any signals */
add r6, r0, r0; /* Arg 2: sigset_t *oldset */
/* Finally, return to user state. */
-1:
- swi r0, r0, PER_CPU(KM); /* Now officially in user state. */
+1: set_bip; /* Ints masked for state restore */
swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
VM_OFF;
tophys(r1,r1);
bri 6f;
/* Return to kernel state. */
-2: VM_OFF;
+2: set_bip; /* Ints masked for state restore */
+ VM_OFF;
tophys(r1,r1);
RESTORE_REGS;
addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */
C_ENTRY(sys_fork_wrapper):
addi r5, r0, SIGCHLD /* Arg 0: flags */
lwi r6, r1, PTO+PT_R1 /* Arg 1: child SP (use parent's) */
- la r7, r1, PTO /* Arg 2: parent context */
+ addik r7, r1, PTO /* Arg 2: parent context */
add r8. r0, r0 /* Arg 3: (unused) */
add r9, r0, r0; /* Arg 4: (unused) */
- add r10, r0, r0; /* Arg 5: (unused) */
brid do_fork /* Do real work (tail-call) */
- nop;
+ add r10, r0, r0; /* Arg 5: (unused) */
/* This the initial entry point for a new child thread, with an appropriate
stack in place that makes it look the the child is in the middle of an
bralid r15, schedule_tail; /* ...which is schedule_tail's arg */
add r3, r5, r0; /* switch_thread returns the prev task */
/* ( in the delay slot ) */
- add r3, r0, r0; /* Child's fork call should return 0. */
brid ret_from_trap; /* Do normal trap return */
- nop;
+ add r3, r0, r0; /* Child's fork call should return 0. */
C_ENTRY(sys_vfork):
brid microblaze_vfork /* Do real work (tail-call) */
- la r5, r1, PTO
+ addik r5, r1, PTO
C_ENTRY(sys_clone):
bnei r6, 1f; /* See if child SP arg (arg 1) is 0. */
lwi r6, r1, PTO + PT_R1; /* If so, use paret's stack ptr */
-1: add r10, r0, r9; /* Arg 6: (child_tidptr) */
- add r9, r0, r8; /* Arg 5: (parent_tidptr) */
- add r8, r0, r7; /* Arg 4: (stack_size) */
- la r7, r1, PTO; /* Arg 3: pt_regs */
- brid do_fork /* Do real work (tail-call) */
- nop
+1: addik r7, r1, PTO; /* Arg 2: parent context */
+ add r8, r0, r0; /* Arg 3: (unused) */
+ add r9, r0, r0; /* Arg 4: (unused) */
+ brid do_fork /* Do real work (tail-call) */
+ add r10, r0, r0; /* Arg 5: (unused) */
C_ENTRY(sys_execve):
- la r8, r1, PTO; /* add user context as 4th arg */
brid microblaze_execve; /* Do real work (tail-call).*/
- nop;
+ addik r8, r1, PTO; /* add user context as 4th arg */
C_ENTRY(sys_rt_sigreturn_wrapper):
swi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
swi r4, r1, PTO+PT_R4;
- la r5, r1, PTO; /* add user context as 1st arg */
brlid r15, sys_rt_sigreturn /* Do real work */
- nop;
+ addik r5, r1, PTO; /* add user context as 1st arg */
lwi r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
lwi r4, r1, PTO+PT_R4;
bri ret_from_trap /* fall through will not work here due to align */
/*
* HW EXCEPTION rutine start
*/
-
-#define SAVE_STATE \
- swi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* Save r11 */ \
- set_bip; /*equalize initial state for all possible entries*/\
- clear_eip; \
- enable_irq; \
- set_ee; \
- /* See if already in kernel mode.*/ \
- lwi r11, r0, TOPHYS(PER_CPU(KM)); \
- beqi r11, 1f; /* Jump ahead if coming from user */\
- /* Kernel-mode state save. */ \
- /* Reload kernel stack-ptr. */ \
- lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \
- tophys(r1,r11); \
- swi r11, r1, (PT_R1-PT_SIZE); /* Save original SP. */ \
- lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */\
- addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\
- SAVE_REGS \
- /* PC, before IRQ/trap - this is one instruction above */ \
- swi r17, r1, PTO+PT_PC; \
- \
- addi r11, r0, 1; /* Was in kernel-mode. */ \
- swi r11, r1, PTO+PT_MODE; \
- brid 2f; \
- nop; /* Fill delay slot */ \
-1: /* User-mode state save. */ \
- lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */\
- lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\
- tophys(r1,r1); \
- lwi r1, r1, TS_THREAD_INFO; /* get the thread info */ \
- addik r1, r1, THREAD_SIZE; /* calculate kernel stack pointer */\
- tophys(r1,r1); \
- \
- addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\
- SAVE_REGS \
- /* PC, before IRQ/trap - this is one instruction above FIXME*/ \
- swi r17, r1, PTO+PT_PC; \
- \
- swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */ \
- lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \
- swi r11, r1, PTO+PT_R1; /* Store user SP. */ \
- addi r11, r0, 1; \
- swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode.*/\
-2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); \
- /* Save away the syscall number. */ \
- swi r0, r1, PTO+PT_R0; \
- tovirt(r1,r1)
-
C_ENTRY(full_exception_trap):
- swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */
/* adjust exception address for privileged instruction
* for finding where is it */
addik r17, r17, -4
SAVE_STATE /* Save registers */
+ /* PC, before IRQ/trap - this is one instruction above */
+ swi r17, r1, PTO+PT_PC;
+ tovirt(r1,r1)
/* FIXME this can be store directly in PT_ESR reg.
* I tested it but there is a fault */
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
- la r15, r0, ret_from_exc - 8
- la r5, r1, PTO /* parameter struct pt_regs * regs */
+ addik r15, r0, ret_from_exc - 8
mfs r6, resr
nop
mfs r7, rfsr; /* save FSR */
nop
mts rfsr, r0; /* Clear sticky fsr */
nop
- la r12, r0, full_exception
- set_vms;
- rtbd r12, 0;
- nop;
+ rted r0, full_exception
+ addik r5, r1, PTO /* parameter struct pt_regs * regs */
/*
* Unaligned data trap.
* The assembler routine is in "arch/microblaze/kernel/hw_exception_handler.S"
*/
C_ENTRY(unaligned_data_trap):
- swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */
+ /* MS: I have to save r11 value and then restore it because
+ * set_bit, clear_eip, set_ee use r11 as temp register if MSR
+ * instructions are not used. We don't need to do if MSR instructions
+ * are used and they use r0 instead of r11.
+ * I am using ENTRY_SP which should be primary used only for stack
+ * pointer saving. */
+ swi r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
+ set_bip; /* equalize initial state for all possible entries */
+ clear_eip;
+ set_ee;
+ lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
SAVE_STATE /* Save registers.*/
+ /* PC, before IRQ/trap - this is one instruction above */
+ swi r17, r1, PTO+PT_PC;
+ tovirt(r1,r1)
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
- la r15, r0, ret_from_exc-8
+ addik r15, r0, ret_from_exc-8
mfs r3, resr /* ESR */
nop
mfs r4, rear /* EAR */
nop
- la r7, r1, PTO /* parameter struct pt_regs * regs */
- la r12, r0, _unaligned_data_exception
- set_vms;
- rtbd r12, 0; /* interrupts enabled */
- nop;
+ rtbd r0, _unaligned_data_exception
+ addik r7, r1, PTO /* parameter struct pt_regs * regs */
/*
* Page fault traps.
*/
/* data and intruction trap - which is choose is resolved int fault.c */
C_ENTRY(page_fault_data_trap):
- swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */
SAVE_STATE /* Save registers.*/
+ /* PC, before IRQ/trap - this is one instruction above */
+ swi r17, r1, PTO+PT_PC;
+ tovirt(r1,r1)
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
- la r15, r0, ret_from_exc-8
- la r5, r1, PTO /* parameter struct pt_regs * regs */
+ addik r15, r0, ret_from_exc-8
mfs r6, rear /* parameter unsigned long address */
nop
mfs r7, resr /* parameter unsigned long error_code */
nop
- la r12, r0, do_page_fault
- set_vms;
- rtbd r12, 0; /* interrupts enabled */
- nop;
+ rted r0, do_page_fault
+ addik r5, r1, PTO /* parameter struct pt_regs * regs */
C_ENTRY(page_fault_instr_trap):
- swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)) /* save stack */
SAVE_STATE /* Save registers.*/
+ /* PC, before IRQ/trap - this is one instruction above */
+ swi r17, r1, PTO+PT_PC;
+ tovirt(r1,r1)
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
- la r15, r0, ret_from_exc-8
- la r5, r1, PTO /* parameter struct pt_regs * regs */
+ addik r15, r0, ret_from_exc-8
mfs r6, rear /* parameter unsigned long address */
nop
ori r7, r0, 0 /* parameter unsigned long error_code */
- la r12, r0, do_page_fault
- set_vms;
- rtbd r12, 0; /* interrupts enabled */
- nop;
+ rted r0, do_page_fault
+ addik r5, r1, PTO /* parameter struct pt_regs * regs */
/* Entry point used to return from an exception. */
C_ENTRY(ret_from_exc):
- set_bip; /* Ints masked for state restore*/
- lwi r11, r1, PTO+PT_MODE;
+ lwi r11, r1, PTO + PT_MODE;
bnei r11, 2f; /* See if returning to kernel mode, */
/* ... if so, skip resched &c. */
* complete register state. Here we save anything not saved by
* the normal entry sequence, so that it may be safely restored
* (in a possibly modified form) after do_signal returns. */
- la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
+ addik r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
addi r7, r0, 0; /* Arg 3: int in_syscall */
bralid r15, do_signal; /* Handle any signals */
add r6, r0, r0; /* Arg 2: sigset_t *oldset */
/* Finally, return to user state. */
-1: swi r0, r0, PER_CPU(KM); /* Now officially in user state. */
+1: set_bip; /* Ints masked for state restore */
swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
VM_OFF;
tophys(r1,r1);
lwi r1, r1, PT_R1 - PT_SIZE; /* Restore user stack pointer. */
bri 6f;
/* Return to kernel state. */
-2: VM_OFF;
+2: set_bip; /* Ints masked for state restore */
+ VM_OFF;
tophys(r1,r1);
RESTORE_REGS;
addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */
/* MS: we are in physical address */
/* Save registers, switch to proper stack, convert SP to virtual.*/
swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP))
- swi r11, r0, TOPHYS(PER_CPU(R11_SAVE));
/* MS: See if already in kernel mode. */
- lwi r11, r0, TOPHYS(PER_CPU(KM));
- beqi r11, 1f; /* MS: Jump ahead if coming from user */
+ mfs r1, rmsr
+ nop
+ andi r1, r1, MSR_UMS
+ bnei r1, 1f
/* Kernel-mode state save. */
- or r11, r1, r0
- tophys(r1,r11); /* MS: I have in r1 physical address where stack is */
-/* MS: Save original SP - position PT_R1 to next stack frame 4 *1 - 152*/
- swi r11, r1, (PT_R1 - PT_SIZE);
-/* MS: restore r11 because of saving in SAVE_REGS */
- lwi r11, r0, TOPHYS(PER_CPU(R11_SAVE));
+ lwi r1, r0, TOPHYS(PER_CPU(ENTRY_SP))
+ tophys(r1,r1); /* MS: I have in r1 physical address where stack is */
/* save registers */
/* MS: Make room on the stack -> activation record */
addik r1, r1, -STATE_SAVE_SIZE;
SAVE_REGS
- /* MS: store mode */
- addi r11, r0, 1; /* MS: Was in kernel-mode. */
- swi r11, r1, PTO + PT_MODE; /* MS: and save it */
+ swi r1, r1, PTO + PT_MODE; /* 0 - user mode, 1 - kernel mode */
brid 2f;
nop; /* MS: Fill delay slot */
1:
/* User-mode state save. */
-/* MS: restore r11 -> FIXME move before SAVE_REG */
- lwi r11, r0, TOPHYS(PER_CPU(R11_SAVE));
/* MS: get the saved current */
lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
tophys(r1,r1);
swi r0, r1, PTO + PT_MODE;
lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
swi r11, r1, PTO+PT_R1;
- /* setup kernel mode to KM */
- addi r11, r0, 1;
- swi r11, r0, TOPHYS(PER_CPU(KM));
-
2:
lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
- swi r0, r1, PTO + PT_R0;
tovirt(r1,r1)
- la r5, r1, PTO;
+ addik r5, r1, PTO;
set_vms;
- la r11, r0, do_IRQ;
- la r15, r0, irq_call;
+ addik r11, r0, do_IRQ;
+ addik r15, r0, irq_call;
irq_call:rtbd r11, 0;
nop;
beqid r11, no_intr_resched
/* Handle a signal return; Pending signals should be in r18. */
addi r7, r0, 0; /* Arg 3: int in_syscall */
- la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
+ addik r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
bralid r15, do_signal; /* Handle any signals */
add r6, r0, r0; /* Arg 2: sigset_t *oldset */
no_intr_resched:
/* Disable interrupts, we are now committed to the state restore */
disable_irq
- swi r0, r0, PER_CPU(KM); /* MS: Now officially in user state. */
swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE);
VM_OFF;
tophys(r1,r1);
/* BIP bit is set on entry, no interrupts can occur */
swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP))
- swi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* Save r11 */
- set_bip; /*equalize initial state for all possible entries*/
- clear_eip;
- enable_irq;
- lwi r11, r0, TOPHYS(PER_CPU(KM));/* See if already in kernel mode.*/
- beqi r11, 1f; /* Jump ahead if coming from user */
+ mfs r1, rmsr
+ nop
+ andi r1, r1, MSR_UMS
+ bnei r1, 1f
/* Kernel-mode state save. */
- lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
- tophys(r1,r11);
- swi r11, r1, (PT_R1-PT_SIZE); /* Save original SP. */
- lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */
+ lwi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* Reload kernel stack-ptr*/
+ tophys(r1,r1);
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */
SAVE_REGS;
- addi r11, r0, 1; /* Was in kernel-mode. */
- swi r11, r1, PTO + PT_MODE;
+ swi r1, r1, PTO + PT_MODE;
brid 2f;
nop; /* Fill delay slot */
1: /* User-mode state save. */
- lwi r11, r0, TOPHYS(r0_ram + PTO + PT_R11); /* restore r11 */
lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */
tophys(r1,r1);
lwi r1, r1, TS_THREAD_INFO; /* get the thread info */
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */
SAVE_REGS;
- swi r0, r1, PTO+PT_MODE; /* Was in user-mode. */
+ swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */
lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
swi r11, r1, PTO+PT_R1; /* Store user SP. */
- addi r11, r0, 1;
- swi r11, r0, TOPHYS(PER_CPU(KM)); /* Now we're in kernel-mode. */
-2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
- /* Save away the syscall number. */
- swi r0, r1, PTO+PT_R0;
+2:
tovirt(r1,r1)
+ set_vms;
addi r5, r0, SIGTRAP /* send the trap signal */
add r6, r0, CURRENT_TASK; /* Get current task ptr into r11 */
addk r7, r0, r0 /* 3rd param zero */
-
- set_vms;
- la r11, r0, send_sig;
- la r15, r0, dbtrap_call;
-dbtrap_call: rtbd r11, 0;
- nop;
+dbtrap_call: rtbd r0, send_sig;
+ addik r15, r0, dbtrap_call;
set_bip; /* Ints masked for state restore*/
- lwi r11, r1, PTO+PT_MODE;
+ lwi r11, r1, PTO + PT_MODE;
bnei r11, 2f;
/* Get current task ptr into r11 */
the normal entry sequence, so that it may be safely restored
(in a possibly modified form) after do_signal returns. */
- la r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
+ addik r5, r1, PTO; /* Arg 1: struct pt_regs *regs */
addi r7, r0, 0; /* Arg 3: int in_syscall */
bralid r15, do_signal; /* Handle any signals */
add r6, r0, r0; /* Arg 2: sigset_t *oldset */
/* Finally, return to user state. */
-1: swi r0, r0, PER_CPU(KM); /* Now officially in user state. */
+1:
swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
VM_OFF;
tophys(r1,r1);
projects / mv-sheeva.git / blobdiff