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| author | Richard Henderson <rth@twiddle.net> | 2011-05-02 08:48:14 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2011-05-02 10:16:53 -0700 |
| commit | 2441ea1234e5b4399954ca64a101794cf6e813b3 (patch) | |
| tree | 44132ef73b15e4929cad97bde91729fe4142f9f1 /sys-clipper.S | |
| parent | 28a139998d9c6f123168c0edd5117ab00c0a6288 (diff) | |
| download | qemu-palcode-2441ea1234e5b4399954ca64a101794cf6e813b3.zip qemu-palcode-2441ea1234e5b4399954ca64a101794cf6e813b3.tar.gz qemu-palcode-2441ea1234e5b4399954ca64a101794cf6e813b3.tar.bz2 | |
clipper: Report ISA interrupts properly.
Diffstat (limited to 'sys-clipper.S')
| -rw-r--r-- | sys-clipper.S | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/sys-clipper.S b/sys-clipper.S index 5296c91..a5771fa 100644 --- a/sys-clipper.S +++ b/sys-clipper.S @@ -28,8 +28,8 @@ * * INPUT PARAMETERS * - * r16 (a0) = whami - * r26 (ra) = return address + * a0 = whami + * p7 = return address */ .globl Sys_Setup .ent Sys_Setup @@ -55,6 +55,42 @@ Sys_Setup: .end Sys_Setup /* + * Sys_Dev_Vector + * + * Load the SRM interrupt vector for the system. + * + * INPUT PARAMETERS + * + * p7 = return address + * + * OUTPUT PARAMETERS + * + * a1 = interrupt vector + */ + + .globl Sys_Dev_Vector + .ent Sys_Dev_Vector +Sys_Dev_Vector: + .frame $sp, 0, p7, 0 + mfpr a1, ptCpuDIR // Load int mask for this CPU + ldq_p a1, 0(a1) + beq a1, CallPal_Rti // No interrupts asserted? + + cttz a1, a1 // Find the first asserted interrupt. + + cmpeq a1, 55, a0 // Is this an ISA interrupt? + addq a1, 16, a1 // PCI interrupt numbers start at 16 + beq a0, 1f + + LOAD_PHYS_PCHIP0_IACK a1 // IACK results in the ISA irq + ldl_p a1, 0(a1) + +1: sll a1, 4, a1 + lda a1, 0x800(a1) + ret $31, (p7), 0 + .end Sys_Dev_Vector + +/* * Cserve_Ena * * Unmask a PCI interrupt |