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[lynx] Initial target support (#329)
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,9 @@ | ||
| platform(lynx-bll COMPLETE PARENT lynx) | ||
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| if(NOT CMAKE_CROSSCOMPILING) | ||
| return() | ||
| endif() | ||
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| install(FILES | ||
| link.ld | ||
| TYPE LIB) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| /* Atari Lynx .bll.o linker script. */ | ||
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| /* Provide imaginary (zero page) registers. */ | ||
| __rc0 = 0x00; | ||
| INCLUDE imag-regs.ld | ||
| ASSERT(__rc31 == 0x001f, "Inconsistent zero page map.") | ||
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| /* An optimization strategy on Lynx hardware is to reserve memory from | ||
| 0xFFF0 down, which is mapped to the graphics hardware but not to the CPU | ||
| by default, to store a display screen. */ | ||
| PROVIDE(__hiram_reserved_size = 0); | ||
| __hiram_start = MIN(0xfc00, 0xfff0 - __hiram_reserved_size); | ||
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| MEMORY { | ||
| zp : ORIGIN = __rc31 + 1, LENGTH = 0x100 - (__rc31 + 1) | ||
| ram (rw) : ORIGIN = 0x200, LENGTH = __hiram_start - 0x200 | ||
| } | ||
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| REGION_ALIAS("c_readonly", ram) | ||
| REGION_ALIAS("c_writeable", ram) | ||
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| SECTIONS { INCLUDE c.ld } | ||
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| /* Set initial soft stack address to just above last memory address. (It grows down.) */ | ||
| __stack = __hiram_start; | ||
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| OUTPUT_FORMAT { | ||
| SHORT(0x0880) | ||
| /* Start address, big-endian. */ | ||
| BYTE(ORIGIN(ram) >> 8) | ||
| BYTE(ORIGIN(ram) & 0xFF) | ||
| /* Length (including header), big-endian. */ | ||
| BYTE((__data_end - ORIGIN(ram) + 10) >> 8) | ||
| BYTE((__data_end - ORIGIN(ram) + 10) & 0xFF) | ||
| SHORT(0x5342) /* BS93 */ | ||
| SHORT(0x3339) | ||
| TRIM(ram) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,25 @@ | ||
| platform(lynx PARENT common) | ||
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| if(NOT CMAKE_CROSSCOMPILING) | ||
| return() | ||
| endif() | ||
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| include_directories(BEFORE SYSTEM .) | ||
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| install(FILES | ||
| _mikey.h | ||
| _suzy.h | ||
| lynx.h | ||
| TYPE INCLUDE) | ||
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| add_platform_library(lynx-crt0) | ||
| merge_libraries(lynx-crt0 | ||
| common-copy-zp-data | ||
| common-init-stack | ||
| common-zero-bss | ||
| common-exit-loop | ||
| ) | ||
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| add_platform_library(lynx-c) | ||
| target_include_directories(lynx-c SYSTEM BEFORE PUBLIC .) | ||
| target_link_libraries(lynx-c PRIVATE common-asminc) |
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| @@ -0,0 +1,115 @@ | ||
| // Copyright 2024 LLVM-MOS Project | ||
| // Licensed under the Apache License, Version 2.0 with LLVM Exceptions. | ||
| // See https://github.com/llvm-mos/llvm-mos-sdk/blob/main/LICENSE for license | ||
| // information. | ||
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| // Originally from cc65. Modified from original version. | ||
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| // clang-format off | ||
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| /*****************************************************************************/ | ||
| /* */ | ||
| /* _mikey.h */ | ||
| /* */ | ||
| /* Atari Lynx, Mikey chip register hardware structures */ | ||
| /* */ | ||
| /* */ | ||
| /* This software is provided 'as-is', without any expressed or implied */ | ||
| /* warranty. In no event will the authors be held liable for any damages */ | ||
| /* arising from the use of this software. */ | ||
| /* */ | ||
| /* Permission is granted to anyone to use this software for any purpose, */ | ||
| /* including commercial applications, and to alter it and redistribute it */ | ||
| /* freely, subject to the following restrictions: */ | ||
| /* */ | ||
| /* 1. The origin of this software must not be misrepresented; you must not */ | ||
| /* claim that you wrote the original software. If you use this software */ | ||
| /* in a product, an acknowledgment in the product documentation would be */ | ||
| /* appreciated but is not required. */ | ||
| /* 2. Altered source versions must be plainly marked as such, and must not */ | ||
| /* be misrepresented as being the original software. */ | ||
| /* 3. This notice may not be removed or altered from any source */ | ||
| /* distribution. */ | ||
| /* */ | ||
| /*****************************************************************************/ | ||
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| #ifndef __MIKEY_H | ||
| #define __MIKEY_H | ||
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| /* timer structure */ | ||
| typedef struct _mikey_timer { | ||
| unsigned char reload; | ||
| unsigned char control; | ||
| unsigned char count; | ||
| unsigned char control2; | ||
| } _mikey_timer; | ||
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| typedef struct _mikey_all_timers { | ||
| struct _mikey_timer timer[8]; | ||
| } _mikey_all_timers; | ||
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| /* audio channel structure */ | ||
| typedef struct _mikey_audio { | ||
| unsigned char volume; | ||
| unsigned char feedback; | ||
| unsigned char dac; | ||
| unsigned char shiftlo; | ||
| unsigned char reload; | ||
| unsigned char control; | ||
| unsigned char count; | ||
| unsigned char other; | ||
| } _mikey_audio; | ||
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| /* Define a structure with the mikey register offsets */ | ||
| struct __mikey { | ||
| struct _mikey_timer timer0; // 0xFD00 | ||
| struct _mikey_timer timer1; // 0xFD04 | ||
| struct _mikey_timer timer2; // 0xFD08 | ||
| struct _mikey_timer timer3; // 0xFD0C | ||
| struct _mikey_timer timer4; // 0xFD10 | ||
| struct _mikey_timer timer5; // 0xFD14 | ||
| struct _mikey_timer timer6; // 0xFD18 | ||
| struct _mikey_timer timer7; // 0xFD1C | ||
| struct _mikey_audio channel_a; // 0xFD20 | ||
| struct _mikey_audio channel_b; // 0xFD28 | ||
| struct _mikey_audio channel_c; // 0xFD30 | ||
| struct _mikey_audio channel_d; // 0xFD38 | ||
| unsigned char attena; // 0xFD40 ?? not yet allocated? | ||
| unsigned char attenb; // 0xFD41 | | ||
| unsigned char attenc; // 0xFD42 | | ||
| unsigned char attend; // 0xFD43 | | ||
| unsigned char panning; // 0xFD44 | | ||
| unsigned char unused0[11]; // 0xFD45 - 0xFD4F not used | ||
| unsigned char mstereo; // 0xFD50 stereo control bits | ||
| unsigned char unused1[47]; // 0xFD51 - 0xFD7F not used | ||
| unsigned char intrst; // 0xFD80 interrupt poll 0 | ||
| unsigned char intset; // 0xFD81 interrupt poll 1 | ||
| unsigned char unused2[2]; // 0xFD82 - 0xFD83 not used | ||
| unsigned char magrdy0; // 0xFD84 mag tape channel0 ready bit | ||
| unsigned char magrdy1; // 0xFD85 mag tape channel1 ready bit | ||
| unsigned char audin; // 0xFD86 audio in | ||
| unsigned char sysctl1; // 0xFD87 control bits | ||
| unsigned char mikeyrev; // 0xFD88 mikey hardware rev | ||
| unsigned char mikeysrev; // 0xFD89 mikey software rev | ||
| unsigned char iodir; // 0xFD8A parallel i/o data dir | ||
| unsigned char iodat; // 0xFD8B parallel data | ||
| unsigned char serctl; // 0xFD8C serial control register | ||
| unsigned char serdat; // 0xFD8D serial data | ||
| unsigned char unused3[2]; // 0xFD8E - 0xFD8F not used | ||
| unsigned char sdoneack; // 0xFD90 suzy done acknowledge | ||
| unsigned char cpusleep; // 0xFD91 cpu bus request disable | ||
| unsigned char dispctl; // 0xFD92 video bus request enable, viddma | ||
| unsigned char pkbkup; // 0xFD93 magic 'P' count | ||
| unsigned char *scrbase; // 0xFD94 start address of video display | ||
| unsigned char unused4[6]; // 0xFD96 - 0xFD9B not used | ||
| unsigned char mtest0; // 0xFD9C | ||
| unsigned char mtest1; // 0xFD9D | ||
| unsigned char mtest2; // 0xFD9E | ||
| unsigned char unused5; // 0xFD9F not used | ||
| unsigned char palette[32]; // 0xFDA0 - 0xFDBF palette 32 bytes | ||
| // 0xFDC0 - 0xFDFF not used | ||
| }; | ||
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| #endif | ||
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