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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,13 +1,13 @@ | ||
| Fuzix test for the P90MB | ||
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| This assumes the 'RetroDOS' ROM is being used for now | ||
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| TODO | ||
| - Loader | ||
| - Serial baud rate setting | ||
| - I2C | ||
| - UART 2 stop bits via mode 3 ? | ||
| - Interrupt testing (emulator doesn't yet handle interrupts) | ||
| - I2C | ||
| - External devices ? | ||
| - Watchdog | ||
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| Longer Term | ||
| - Play with soft control of upper address bits and buddy allocator | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| /* | ||
| * We are loaded somewhere out of the memory window and run | ||
| * Our stack is a C call stack of the form | ||
| * | ||
| * bootloader(uint8_t bootdev, uint8_t *base, uint32_t len, syscallvec) | ||
| * | ||
| * Needs to bne relocatable. | ||
| */ | ||
| .globl start | ||
| .globl loader | ||
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| .mri 1 | ||
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| /* We load the binary into the memory space RetroDOS provided. We will then | ||
| relocate it once we are ready to dump RetroDOS overboard */ | ||
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| ascii "RETRODOSBOOT68" | ||
| loader: | ||
| lea.l syscb(pc),a0 | ||
| move.l 4(sp),4(a0) ; drive | ||
| move.l 8(sp),8(a0) ; load address | ||
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| move.l 16(sp),a4 ; syscall vector | ||
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| move.l a0,-(sp) | ||
| jsr (a4) ; C call into disk loader | ||
| addq #4,sp | ||
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| /* Now dump RetroDOS and run it. This assumes we move the image down which | ||
| happens to be a safe bet but we ought to check and do either direction */ | ||
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| move.l 8(sp),a0 | ||
| move.l #$0400,a1 | ||
| move.w #$3FFF,d0 ; 64K | ||
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| copy: | ||
| move.l (a0)+,(a1)+ | ||
| dbra d0,copy | ||
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| jmp $0400 | ||
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| syscb: | ||
| long $F1 ; raw read | ||
| cbdrive: | ||
| long 0 ; drive | ||
| cbaddr: | ||
| long 0 ; buffer | ||
| long 1 ; LBA | ||
| long 128 ; length (64K for now) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| OUTPUT_ARCH(m68k) | ||
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| SEARCH_DIR(.) | ||
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| MEMORY | ||
| { | ||
| ram (rwx) : ORIGIN = 0x15000, LENGTH = 0x200 | ||
| } | ||
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| /* | ||
| * stick everything in ram (of course) | ||
| */ | ||
| SECTIONS | ||
| { | ||
| .text : | ||
| { | ||
| CREATE_OBJECT_SYMBOLS | ||
| *(.text .text.*) | ||
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| . = ALIGN(0x4); | ||
| /* These are for running static constructors and destructors under ELF. */ | ||
| KEEP (*crtbegin.o(.ctors)) | ||
| KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors)) | ||
| KEEP (*(SORT(.ctors.*))) | ||
| KEEP (*(.ctors)) | ||
| KEEP (*crtbegin.o(.dtors)) | ||
| KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors)) | ||
| KEEP (*(SORT(.dtors.*))) | ||
| KEEP (*(.dtors)) | ||
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| *(.rodata .rodata.*) | ||
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| . = ALIGN(0x4); | ||
| *(.gcc_except_table) | ||
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| . = ALIGN(0x4); | ||
| *(.eh_frame) | ||
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| . = ALIGN(0x4); | ||
| __INIT_SECTION__ = . ; | ||
| LONG (0x4e560000) /* linkw %fp,#0 */ | ||
| *(.init) | ||
| SHORT (0x4e5e) /* unlk %fp */ | ||
| SHORT (0x4e75) /* rts */ | ||
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| . = ALIGN(0x4); | ||
| __FINI_SECTION__ = . ; | ||
| LONG (0x4e560000) /* linkw %fp,#0 */ | ||
| *(.fini) | ||
| SHORT (0x4e5e) /* unlk %fp */ | ||
| SHORT (0x4e75) /* rts */ | ||
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| . = ALIGN(0x4); | ||
| _etext = .; | ||
| *(.lit) | ||
| } > ram | ||
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| .data : | ||
| { | ||
| *(.got.plt) *(.got) | ||
| *(.shdata) | ||
| *(.data .data.*) | ||
| _edata = .; | ||
| } > ram | ||
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| .bss : | ||
| { | ||
| . = ALIGN(0x4); | ||
| __bss_start = . ; | ||
| *(.shbss) | ||
| *(.bss .bss.*) | ||
| *(COMMON) | ||
| _end = ALIGN (0x8); | ||
| __end = _end; | ||
| } > ram | ||
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| .stab 0 (NOLOAD) : | ||
| { | ||
| *(.stab) | ||
| } | ||
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| .stabstr 0 (NOLOAD) : | ||
| { | ||
| *(.stabstr) | ||
| } | ||
| } |
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