mirror of
https://github.com/elliotnunn/powermac-rom.git
synced 2024-12-01 09:50:31 +00:00
161 lines
6.5 KiB
ArmAsm
161 lines
6.5 KiB
ArmAsm
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; ROM version of NKConfigurationInfo struct, based on Mac OS ROM 8=9=10.
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; Lives at ROM + 0x30d000 (and other addresses on OldWorld).
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; From start of ConfigInfo to end of LoMemInit = 4k:
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; Auto-align fields
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aligning on
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import RomTop, RomBtm
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import Mac68kRomTop, Mac68kRomBtm
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import ExTblTop
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import NKTop
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import EmTop, EmBtm, EmEntry, EmKernelTrapTable
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import OpcodeTblTop, OpcodeTblBtm
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ConfigInfo
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; These sums are not checked on NewWorld, but :Tools:ToolSource:RiscLayout.c calcs them anyway
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dcb.l 8, 0 ; 000 ; ROMByteCheckSums ; ROM Checksums - one word for each of 8 byte lanes
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dcb.l 2, 0 ; 020 ; ROMCheckSum64 ; ROM Checksum - 64 bit sum of doublewords
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dc.l RomTop-ConfigInfo ; 028 ; ROMImageBaseOffset ; Offset of Base of total ROM image
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dc.l RomBtm-RomTop ; 02c ; ROMImageSize ; Number of bytes in ROM image
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dc.l 0 ; 030 ; ROMImageVersion ; ROM Version number for entire ROM
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; ROM component Info (offsets are from base of ConfigInfo page)
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dc.l Mac68kRomTop-ConfigInfo ; 034 ; Mac68KROMOffset ; Offset of base of Macintosh 68K ROM
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dc.l Mac68kRomBtm-Mac68kRomTop ; 038 ; Mac68KROMSize ; Number of bytes in Macintosh 68K ROM
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dc.l ExTblTop-ConfigInfo ; 03c ; ExceptionTableOffset ; Offset of base of PowerPC Exception Table Code
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dc.l 0xc000 ; 040 ; ExceptionTableSize ; Number of bytes in PowerPC Exception Table Code (generous)
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dc.l RomTop+0x320000-ConfigInfo ; 044 ; HWInitCodeOffset ; Offset of base of Hardware Init Code (no longer exists)
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dc.l 0x10000 ; 048 ; HWInitCodeSize ; Number of bytes in Hardware Init Code
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dc.l NKTop-ConfigInfo ; 04c ; KernelCodeOffset ; Offset of base of NanoKernel Code
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dc.l 0x10000 ; 050 ; KernelCodeSize ; Number of bytes in NanoKernel Code (too small)
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dc.l EmTop-ConfigInfo ; 054 ; EmulatorCodeOffset ; Offset of base of Emulator Code
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dc.l EmBtm-EmTop ; 058 ; EmulatorCodeSize ; Number of bytes in Emulator Code
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dc.l OpcodeTblTop-ConfigInfo ; 05c ; OpcodeTableOffset ; Offset of base of Opcode Table
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dc.l OpcodeTblBtm-OpcodeTblTop ; 060 ; OpcodeTableSize ; Number of bytes in Opcode Table
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; Offsets within the Emulator Data Page.
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string AsIs
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@s dc.b 'NewWorld v1.0' ; 064 ; BootstrapVersion ; Bootstrap loader version info
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org @s + 16
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dc.l 0xf00 ; 074 ; BootVersionOffset ; offset within EmulatorData of BootstrapVersion
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dc.l 0x100 ; 078 ; ECBOffset ; offset within EmulatorData of ECB
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dc.l 0x070 ; 07c ; IplValueOffset ; offset within EmulatorData of IplValue
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; Offsets within the Emulator Code.
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dc.l EmEntry-EmTop ; 080 ; EmulatorEntryOffset ; offset within Emulator Code of entry point
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dc.l EmKernelTrapTable-EmTop ; 084 ; KernelTrapTableOffset ; offset within Emulator Code of KernelTrapTable
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; Interrupt Passing Masks.
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dc.l 0x00200000 ; 088 ; TestIntMaskInit ; initial value for test interrupt mask
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dc.l 0xff9fffff ; 08c ; ClearIntMaskInit ; initial value for clear interrupt mask
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dc.l 0x00e00000 ; 090 ; PostIntMaskInit ; initial value for post interrupt mask
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dc.l 0x808e0000 ; 094 ; LA_InterruptCtl ; logical address of Interrupt Control I/O page
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dc.b 6 ; 098 ; InterruptHandlerKind ; kind of handler to use
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dc.l 0x5fffe000 ; 09c ; LA_InfoRecord ; logical address of InfoRecord page
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dc.l 0x68ffe000 ; 0a0 ; LA_KernelData ; logical address of KernelData page
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dc.l 0x68fff000 ; 0a4 ; LA_EmulatorData ; logical address of EmulatorData page
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dc.l 0x68080000 ; 0a8 ; LA_DispatchTable ; logical address of Dispatch Table
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dc.l 0x68060000 ; 0ac ; LA_EmulatorCode ; logical address of Emulator Code
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dc.l LowMemVals-ConfigInfo ; 0b0 ; MacLowMemInitOffset ; offset to list of LowMem addr/data values
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;
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; Then the pagemap init stuff is filled by the trampoline at boot
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;
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; Address Space Mapping
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dc.l 0 ; 0b4 ; PageAttributeInit ; default WIMG, PP settings for PTE creation
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dc.l 0 ; 0b8 ; PageMapInitSize ; size of page mapping info
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dc.l 0 ; 0bc ; PageMapInitOffset ; offset to page mapping info (from base of ConfigInfo)
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dc.l 0 ; 0c0 ; PageMapIRPOffset ; offset of InfoRecord map info (from base of PageMap)
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dc.l 0 ; 0c4 ; PageMapKDPOffset ; offset of KernelData map info (from base of PageMap)
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dc.l 0 ; 0c8 ; PageMapEDPOffset ; offset of EmulatorData map info (from base of PageMap)
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dcb.l 32, 0 ; 0cc ; SegMap32SupInit ; 32 bit mode Segment Map Supervisor space
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dcb.l 32, 0 ; 14c ; SegMap32UsrInit ; 32 bit mode Segment Map User space
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dcb.l 32, 0 ; 1cc ; SegMap32CPUInit ; 32 bit mode Segment Map CPU space
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dcb.l 32, 0 ; 24c ; SegMap32OvlInit ; 32 bit mode Segment Map Overlay mode
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dcb.l 32, 0 ; 2cc ; BATRangeInit ; BAT mapping ranges
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dc.l 0 ; 34c ; BatMap32SupInit ; 32 bit mode BAT Map Supervisor space
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dc.l 0 ; 350 ; BatMap32UsrInit ; 32 bit mode BAT Map User space
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dc.l 0 ; 354 ; BatMap32CPUInit ; 32 bit mode BAT Map CPU space
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dc.l 0 ; 358 ; BatMap32OvlInit ; 32 bit mode BAT Map Overlay mode
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; Only needed for Smurf
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dc.l 0 ; 35c ; SharedMemoryAddr ; physical address of Mac/Smurf shared message mem
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dc.l -1 ; 360 ; PA_RelocatedLowMemInit ; physical address of RelocatedLowMem
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dc.l 0x330000 - 0x30d000 ; 364 ; OpenFWBundleOffset ; Offset of base of OpenFirmware PEF Bundle
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dc.l 0x20000 ; 368 ; OpenFWBundleSize ; Number of bytes in OpenFirmware PEF Bundle
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dc.l 0xff800000 ; 36c ; LA_OpenFirmware ; logical address of Open Firmware
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dc.l 0x00400000 ; 370 ; PA_OpenFirmware ; physical address of Open Firmware
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dc.l 0xfff0c000 ; 374 ; LA_HardwarePriv ; logical address of HardwarePriv callback
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; There are still some fixed-location fields here that the Trampoline will populate,
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; but the ROM we are building contains just zeros.
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;
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; Key/value pairs for initializing Low Memory Globals.
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; (at the end of ConfigInfo's 4k max size)
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;
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; A wee little macro to write LoMem key/value pairs *below* the asm location counter
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macro
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LowMem &addr, &val
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@b
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org @b - 4
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dc.l &val
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org @b - 8
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dc.l &addr
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org @b - 8
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endm
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; Sentinel zero at end (late address) of list
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org 4096 - 4
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dc.l 0
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org 4096 - 4
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; The table (older RISC versions have more in here.)
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; The 68k emulator's cold-start vector, points to a "JMP StartBoot"
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; instruction in the 68k ROM header. (Normally this value would be
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; read from the ROM while it was overlaid on RAM at cold start, but
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; why emulate that on a PowerPC?)
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; SheepShaver patches the 68k reset vector around this location,
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; but assumed offset 0xfd8.
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LowMem 0x00000004, 0xffc0002a
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LowMemVals
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