Browse Source
git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5432 42af7a65-404d-4744-a932-0658087f49c3sbg
patacongo
12 years ago
7 changed files with 520 additions and 253 deletions
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@@ -0,0 +1,89 @@
|
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;************************************************************************** |
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; arch/z80/src/z180/z180_romvectors.asm |
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; |
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; Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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; Author: Gregory Nutt <gnutt@nuttx.org> |
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; |
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; Redistribution and use in source and binary forms, with or without |
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; modification, are permitted provided that the following conditions |
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; are met: |
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; |
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; 1. Redistributions of source code must retain the above copyright |
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; notice, this list of conditions and the following disclaimer. |
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; 2. Redistributions in binary form must reproduce the above copyright |
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; notice, this list of conditions and the following disclaimer in |
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; the documentation and/or other materials provided with the |
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; distribution. |
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; 3. Neither the name NuttX nor the names of its contributors may be |
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; used to endorse or promote products derived from this software |
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; without specific prior written permission. |
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; |
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; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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; FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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; COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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; BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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; OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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; AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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; ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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; POSSIBILITY OF SUCH DAMAGE. |
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; |
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;************************************************************************** |
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|
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.title NuttX for the Z180 |
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.module z180_romvectors |
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|
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;************************************************************************** |
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; Constants |
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;************************************************************************** |
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|
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;************************************************************************** |
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; Global symbols used |
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;************************************************************************** |
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|
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.globl _up_int1 ; Vector offset 0: External /INT1 |
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.globl _up_int2 ; Vector offset 2: External /INT2 |
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.globl _up_prt0 ; Vector offset 4: PRT channel 0 |
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.globl _up_prt1 ; Vector offset 6: PRT channel 1 |
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.globl _up_dma0 ; Vector offset 8: DMA channel 0 |
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.globl _up_dma1 ; Vector offset 8: DMA channel 1 |
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.globl _up_csio ; Vector offset 12: Clocked serial I/O |
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.globl _up_asci0 ; Vector offset 14: Async channel 0 |
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.globl _up_asci1 ; Vector offset 16: Async channel 1 |
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.globl _up_unused ; Vector offset 18: Unused |
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.globl _up_unused ; Vector offset 20: Unused |
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.globl _up_unused ; Vector offset 22: Unused |
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.globl _up_unused ; Vector offset 24: Unused |
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.globl _up_unused ; Vector offset 26: Unused |
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.globl _up_unused ; Vector offset 28: Unused |
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.globl _up_unused ; Vector offset 30: Unused |
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|
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;************************************************************************** |
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; Interrupt Vector Table |
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;************************************************************************** |
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; The start of the _VECTORS area must be set by the linker to lie at some |
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; 32-byte-aligned address |
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.area _VECTORS |
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_up_vectors:: |
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.dw up_int1 ; Vector offset 0: External /INT1 |
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.dw up_int2 ; Vector offset 2: External /INT2 |
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.dw up_prt0 ; Vector offset 4: PRT channel 0 |
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.dw up_prt1 ; Vector offset 6: PRT channel 1 |
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.dw up_dma0 ; Vector offset 8: DMA channel 0 |
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.dw up_dma1 ; Vector offset 8: DMA channel 1 |
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.dw up_csio ; Vector offset 12: Clocked serial I/O |
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.dw up_asci0 ; Vector offset 14: Async channel 0 |
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.dw up_asci1 ; Vector offset 16: Async channel 1 |
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.dw up_unused ; Vector offset 18: Unused |
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.dw up_unused ; Vector offset 20: Unused |
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.dw up_unused ; Vector offset 22: Unused |
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.dw up_unused ; Vector offset 24: Unused |
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.dw up_unused ; Vector offset 26: Unused |
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.dw up_unused ; Vector offset 28: Unused |
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.dw up_unused ; Vector offset 30: Unused |
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|
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;************************************************************************** |
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; arch/z80/src/z180/z180_vectcommon.asm |
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; |
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; Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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; Author: Gregory Nutt <gnutt@nuttx.org> |
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; |
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; Redistribution and use in source and binary forms, with or without |
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; modification, are permitted provided that the following conditions |
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; are met: |
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; |
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; 1. Redistributions of source code must retain the above copyright |
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; notice, this list of conditions and the following disclaimer. |
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; 2. Redistributions in binary form must reproduce the above copyright |
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; notice, this list of conditions and the following disclaimer in |
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; the documentation and/or other materials provided with the |
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; distribution. |
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; 3. Neither the name NuttX nor the names of its contributors may be |
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; used to endorse or promote products derived from this software |
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; without specific prior written permission. |
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; |
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; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
||||
; FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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; COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
||||
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
||||
; BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
||||
; OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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; AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
||||
; ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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; POSSIBILITY OF SUCH DAMAGE. |
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; |
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;************************************************************************** |
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|
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.title NuttX for the Z180 |
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.module z180_vectcommon |
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|
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;************************************************************************** |
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; Constants |
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;************************************************************************** |
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|
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; Register save area layout |
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XCPT_I == 0 ; Offset 0: Saved I w/interrupt state in carry |
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XCPT_BC == 2 ; Offset 1: Saved BC register |
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XCPT_DE == 4 ; Offset 2: Saved DE register |
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XCPT_IX == 6 ; Offset 3: Saved IX register |
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XCPT_IY == 8 ; Offset 4: Saved IY register |
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XCPT_SP == 10 ; Offset 5: Offset to SP at time of interrupt |
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XCPT_HL == 12 ; Offset 6: Saved HL register |
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XCPT_AF == 14 ; Offset 7: Saved AF register |
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XCPT_PC == 16 ; Offset 8: Offset to PC at time of interrupt |
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;************************************************************************** |
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; Global symbols used |
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;************************************************************************** |
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.globl _up_doirq ; Interrupt decoding logic |
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;************************************************************************** |
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; Vector Handlers |
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;************************************************************************** |
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.area _CODE |
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up_int1:: ; Vector offset 0: External /INT1 |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #9 ; 9 = Z180_INT1 |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_int2:: ; Vector offset 2: External /INT2 |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #10 ; 10 = Z180_INT2 |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_prt0:: ; Vector offset 4: PRT channel 0 |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #11 ; 11 = Z180_PRT0 |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_prt1:: ; Vector offset 6: PRT channel 1 |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #12 ; 12 = Z180_PRT1 |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_dma0:: ; Vector offset 8: DMA channel 0 |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #13 ; 13 = Z180_DMA0 |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_dma1:: ; Vector offset 8: DMA channel 1 |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #14 ; 14 = Z180_DMA1 |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_csio:: ; Vector offset 12: Clocked serial I/O |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #15 ; 15 = Z180_CSIO |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_asci0:: ; Vector offset 14: Async channel 0 |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #16 ; 16 = Z180_ASCI0 |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_asci1:: ; Vector offset 16: Async channel 1 |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #17 ; 17 = Z180_ASCI1 |
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jr _up_vectcommon ; Remaining RST handling is common |
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up_unused:: ; Vector offset 18: Unused |
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; Save AF on the stack, set the interrupt number and jump to the |
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; common reset handling logic. |
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; Offset 8: Return PC is already on the stack |
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push af ; Offset 7: AF (retaining flags) |
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ld a, #18 ; 18 = Z180_UNUSED |
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jr _up_vectcommon ; Remaining RST handling is common |
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|
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;************************************************************************** |
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; Common Interrupt handler |
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;************************************************************************** |
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_up_vectcommon:: |
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; Create a register frame. SP points to top of frame + 4, pushes |
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; decrement the stack pointer. Already have |
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; |
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; Offset 8: Return PC is already on the stack |
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; Offset 7: AF (retaining flags) |
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; |
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; IRQ number is in A |
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|
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push hl ; Offset 6: HL |
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ld hl, #(3*2) ; HL is the value of the stack pointer before |
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add hl, sp ; the interrupt occurred |
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push hl ; Offset 5: Stack pointer |
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push iy ; Offset 4: IY |
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push ix ; Offset 3: IX |
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push de ; Offset 2: DE |
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push bc ; Offset 1: BC |
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|
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ld b, a ; Save the reset number in B |
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ld a, i ; Parity bit holds interrupt state |
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push af ; Offset 0: I with interrupt state in parity |
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di |
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; Call the interrupt decode logic. SP points to the beginning of the reg structure |
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ld hl, #0 ; Argument #2 is the beginning of the reg structure |
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add hl, sp ; |
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push hl ; Place argument #2 at the top of stack |
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push bc ; Argument #1 is the Reset number |
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inc sp ; (make byte sized) |
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call _up_doirq ; Decode the IRQ |
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; On return, HL points to the beginning of the reg structure to restore |
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; Note that (1) the arguments pushed on the stack are not popped, and (2) the |
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; original stack pointer is lost. In the normal case (no context switch), |
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; HL will contain the value of the SP before the arguments were pushed. |
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ld sp, hl ; Use the new stack pointer |
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; Restore registers. HL points to the beginning of the reg structure to restore |
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ex af, af' ; Select alternate AF |
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pop af ; Offset 0: AF' = I with interrupt state in carry |
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ex af, af' ; Restore original AF |
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pop bc ; Offset 1: BC |
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pop de ; Offset 2: DE |
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pop ix ; Offset 3: IX |
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pop iy ; Offset 4: IY |
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exx ; Use alternate BC/DE/HL |
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ld hl, #-2 ; Offset of SP to account for ret addr on stack |
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pop de ; Offset 5: HL' = Stack pointer after return |
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add hl, de ; HL = Stack pointer value before return |
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exx ; Restore original BC/DE/HL |
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pop hl ; Offset 6: HL |
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pop af ; Offset 7: AF |
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; Restore the stack pointer |
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exx ; Use alternate BC/DE/HL |
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ld sp, hl ; Set SP = saved stack pointer value before return |
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exx ; Restore original BC/DE/HL |
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; Restore interrupt state |
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ex af, af' ; Recover interrupt state |
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jp po, nointenable ; Odd parity, IFF2=0, means disabled |
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ex af, af' ; Restore AF (before enabling interrupts) |
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ei ; yes |
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reti |
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nointenable:: |
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ex af, af' ; Restore AF |
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reti |
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@ -0,0 +1,90 @@
@@ -0,0 +1,90 @@
|
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;************************************************************************** |
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; arch/z80/src/z180/z180_vectors.asm |
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; |
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; Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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; Author: Gregory Nutt <gnutt@nuttx.org> |
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; |
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; Redistribution and use in source and binary forms, with or without |
||||
; modification, are permitted provided that the following conditions |
||||
; are met: |
||||
; |
||||
; 1. Redistributions of source code must retain the above copyright |
||||
; notice, this list of conditions and the following disclaimer. |
||||
; 2. Redistributions in binary form must reproduce the above copyright |
||||
; notice, this list of conditions and the following disclaimer in |
||||
; the documentation and/or other materials provided with the |
||||
; distribution. |
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; 3. Neither the name NuttX nor the names of its contributors may be |
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; used to endorse or promote products derived from this software |
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; without specific prior written permission. |
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; |
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; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
||||
; FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
||||
; COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
||||
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
||||
; BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
||||
; OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
||||
; AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
||||
; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
||||
; ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
||||
; POSSIBILITY OF SUCH DAMAGE. |
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; |
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;************************************************************************** |
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|
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.title NuttX for the Z180 |
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.module z180_vectors |
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|
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;************************************************************************** |
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; Constants |
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;************************************************************************** |
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|
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;************************************************************************** |
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; Global symbols used |
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;************************************************************************** |
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|
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.globl _up_int1 ; Vector offset 0: External /INT1 |
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.globl _up_int2 ; Vector offset 2: External /INT2 |
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.globl _up_prt0 ; Vector offset 4: PRT channel 0 |
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.globl _up_prt1 ; Vector offset 6: PRT channel 1 |
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.globl _up_dma0 ; Vector offset 8: DMA channel 0 |
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.globl _up_dma1 ; Vector offset 8: DMA channel 1 |
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.globl _up_csio ; Vector offset 12: Clocked serial I/O |
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.globl _up_asci0 ; Vector offset 14: Async channel 0 |
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.globl _up_asci1 ; Vector offset 16: Async channel 1 |
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.globl _up_unused ; Vector offset 18: Unused |
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.globl _up_unused ; Vector offset 20: Unused |
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.globl _up_unused ; Vector offset 22: Unused |
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.globl _up_unused ; Vector offset 24: Unused |
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.globl _up_unused ; Vector offset 26: Unused |
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.globl _up_unused ; Vector offset 28: Unused |
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.globl _up_unused ; Vector offset 30: Unused |
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;************************************************************************** |
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; Interrupt Vector Table |
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;************************************************************************** |
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; The Vector Table is located at address 0x0040, between the RST vectors |
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; and the NMI vector |
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.area _VECTORS (ABS) |
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.org 0x0040 |
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_up_vectors:: |
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.dw up_int1 ; Vector offset 0: External /INT1 |
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.dw up_int2 ; Vector offset 2: External /INT2 |
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.dw up_prt0 ; Vector offset 4: PRT channel 0 |
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.dw up_prt1 ; Vector offset 6: PRT channel 1 |
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.dw up_dma0 ; Vector offset 8: DMA channel 0 |
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.dw up_dma1 ; Vector offset 8: DMA channel 1 |
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.dw up_csio ; Vector offset 12: Clocked serial I/O |
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.dw up_asci0 ; Vector offset 14: Async channel 0 |
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.dw up_asci1 ; Vector offset 16: Async channel 1 |
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.dw up_unused ; Vector offset 18: Unused |
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.dw up_unused ; Vector offset 20: Unused |
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.dw up_unused ; Vector offset 22: Unused |
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.dw up_unused ; Vector offset 24: Unused |
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.dw up_unused ; Vector offset 26: Unused |
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.dw up_unused ; Vector offset 28: Unused |
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.dw up_unused ; Vector offset 30: Unused |
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