[ViewVC] Diff of: cebix/SheepShaver/src/Unix/ppc

Comparing SheepShaver/src/Unix/ppc_asm.S (file contents):
Revision 1.5 by gbeauche, 2005-06-25T06:33:39Z vs.
Revision 1.10 by asvitkine, 2009-08-18T18:26:11Z

+        isync
+        lwarx   r5,0,r3
+        cmpi    0,r5,0x0000
-<
+        beq     1f
->
+        bne     1f
+        stwcx.  r4,0,r3
+        bne-    0b
+:      isync
+        // Restore PowerPC registers
+        lwz     r1,XLM_EMUL_RETURN_STACK(0)
+        RESTORE_SYSTEM_R2
-–
+        RESTORE_SYSTEM_R13
+        lmw     r13,20(r1)
+        lfd     f14,20+19*4+0*8(r1)
+        lfd     f15,20+19*4+1*8(r1)
+        stw     r1,XLM_EMUL_RETURN_STACK(0)
+        // Preset registers for ROM boot routine
-<
+        lis     r3,0x40b0               // Pointer to ROM boot structure
-<
+        ori     r3,r3,0xd000
->
+        lis   r3,ASM_HA16(C_SYMBOL_NAME(ROMBase))               // Pointer to ROM boot structure:
->
+        lwz   r3,ASM_LO16(C_SYMBOL_NAME(ROMBase))(r3)   //    r3 = ROMBase + 0x30d000
->
+        addis r3,r3,ASM_HA16(0x30d000)
->
+        addi  r3,r3,ASM_LO16(0x30d000)
+        // 68k emulator is now active
+        li      r0,MODE_68K
+C_SYMBOL_NAME(r_get_resource):
+        do_get_resource XLM_R_GET_RESOURCE
-+
+ASM_MACRO_START do_get_named_resource ASM_MACRO_ARG0_DEF
-+
+        // Create stack frame
-+
+        mflr    r0
-+
+        stw     r0,8(r1)
-+
+        stwu    r1,-(56+12)(r1)
-+
-+
+        // Save type/ID
-+
+        stw     r3,56(r1)
-+
+        stw     r4,56+4(r1)
-+
-+
+        // Call old routine
-+
+        lwz     r0,ASM_MACRO_ARG0(0)
-+
+        lwz     r2,XLM_RES_LIB_TOC(0)
-+
+        mtctr   r0
-+
+        bctrl
-+
+        stw     r3,56+8(r1)             // Save handle
-+
-+
+        // Call CheckLoad
-+
+        RESTORE_SYSTEM_R2
-+
+        RESTORE_SYSTEM_R13
-+
+        lwz     r3,56(r1)
-+
+        lwz     r4,56+4(r1)
-+
+        lwz     r5,56+8(r1)
-+
+        bl      C_SYMBOL_NAME(named_check_load_invoc)
-+
+        lwz     r3,56+8(r1)             // Restore handle
-+
-+
+        // Return to caller
-+
+        lwz     r0,56+12+8(r1)
-+
+        mtlr    r0
-+
+        addi    r1,r1,56+12
-+
+        blr
-+
+ASM_MACRO_END
-+
-+
+        ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_named_resource)
-+
+C_SYMBOL_NAME(get_named_resource):
-+
+        do_get_named_resource XLM_GET_NAMED_RESOURCE
-+
-+
+        ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_1_named_resource)
-+
+C_SYMBOL_NAME(get_1_named_resource):
-+
+        do_get_named_resource XLM_GET_1_NAMED_RESOURCE
-+
+/*
+ *  void ppc_interrupt(uint32 entry{r3}, uint32 kernel_data{r4}) - Execute PPC interrupt
+        // Enter nanokernel
+        mtlr    r3
+        blr
-+
-+
-+
+/*
-+
+ *  Define signal handlers with alternate stack initialization magic
-+
+ */
-+
-+
+#define SIG_STACK_SIZE 0x10000
-+
-+
+ASM_MACRO_START do_define_signal_handler        \
-+
+        ASM_MACRO_ARG0_DEF /* name */           \
-+
+        ASM_MACRO_ARG1_DEF /* stack */          \
-+
+        ASM_MACRO_ARG2_DEF /* stack id */       \
-+
+        ASM_MACRO_ARG3_DEF /* signal handler */
-+
-+
+        // Alternate stack lower base for this signal handler
-+
+        .lcomm ASM_MACRO_ARG1,SIG_STACK_SIZE,ASM_ALIGN_2(4)
-+
+        ASM_TYPE(ASM_MACRO_ARG1,@object)
-+
-+
+        // Represents the current nest level for this signal handler
-+
+        // Note that in SheepShaver, SIGUSR2 signals are blocked while
-+
+        // handling other signals so, it's unlikely we ever get a nest
-+
+        // level greater than 1
-+
+        .lcomm ASM_MACRO_ARG2,4,ASM_ALIGN_2(2)
-+
+        ASM_TYPE(ASM_MACRO_ARG2,@object)
-+
-+
+        ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(ASM_MACRO_ARG0)
-+
+C_SYMBOL_NAME(ASM_MACRO_ARG0):
-+
+        // Preserve args in scratch registers
-+
+        mflr    r14
-+
+        mr      r15,r3
-+
+        mr      r16,r4
-+
+        mr      r17,r5
-+
+        mr      r18,r1
-+
-+
+        // Atomically increase stack_id
-+
+        lis     r19,ASM_HA16(ASM_MACRO_ARG2)
-+
+        la      r19,ASM_LO16(ASM_MACRO_ARG2)(r19)
-+
+        li      r4,1
-+
+        mr      r3,r19
-+
+        bl      C_SYMBOL_NAME(atomic_add)
-+
+        cmpwi   r3,0
-+
+        bne-    1f
-+
-+
+        // ID was 0, we can use the local stack
-+
+        lis     r9,ASM_HA16(ASM_MACRO_ARG1)
-+
+        lis     r3,(SIG_STACK_SIZE>>16)
-+
+        la      r9,ASM_LO16(ASM_MACRO_ARG1)(r9)
-+
+        addi    r3,r3,((SIG_STACK_SIZE&0xffff)-64)
-+
+        add     r1,r9,r3
-+
-+
+:      // Invoke signal handler
-+
+        stwu    r1,-16(r1)
-+
+        mr      r3,r15
-+
+        mr      r4,r16
-+
+        mr      r5,r17
-+
+        bl      C_SYMBOL_NAME(ASM_MACRO_ARG3)
-+
+        addi    r1,r1,16
-+
-+
+        // Atomically decrease stack id
-+
+        mr      r3,r19
-+
+        li      r4,-1
-+
+        bl      C_SYMBOL_NAME(atomic_add)
-+
-+
+        // Restore kernel stack and return
-+
+        mtlr    r14
-+
+        mr      r1,r18
-+
+        blr
-+
+ASM_MACRO_END
-+
-+
+#define DEFINE_SIGNAL_HANDLER(NAME)               \
-+
+        do_define_signal_handler                  \
-+
+        NAME##_handler_init     ASM_MACRO_ARG_SEP \
-+
+        NAME##_stack            ASM_MACRO_ARG_SEP \
-+
+        NAME##_stack_id         ASM_MACRO_ARG_SEP \
-+
+        NAME##_handler
-+
-+
+DEFINE_SIGNAL_HANDLER(sigusr2)

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing SheepShaver/src/Unix/ppc_asm.S (file contents): Revision 1.5 by gbeauche, 2005-06-25T06:33:39Z vs. Revision 1.10 by asvitkine, 2009-08-18T18:26:11Z

Diff Legend

Comparing SheepShaver/src/Unix/ppc_asm.S (file contents):
Revision 1.5 by gbeauche, 2005-06-25T06:33:39Z vs.
Revision 1.10 by asvitkine, 2009-08-18T18:26:11Z