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65X-DOS
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code cleanup

This commit is contained in:
Kyle J Cardoza 2024-07-11 19:29:16 -04:00
parent 28d7e2d1f1
commit 535d348893
7 changed files with 105 additions and 397 deletions
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10
config/boot.mk Normal file
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@ -0,0 +1,10 @@
BOOT_SRC := $(wildcard src/boot/*.s)
BOOT_OBJ := $(BOOT_SRC:.s=.o)
BOOT_LDFLAGS := --list-file build/boot.lst
build/boot.bin: $(BOOT_OBJ)
@echo "Linking $@..."
@$(LD) -o $@ config/boot.scm $(LDFLAGS) $(BOOT_LDFLAGS) $^
@mv build/boot.raw $@

36
config/boot.scm Normal file
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@ -0,0 +1,36 @@
(define memories '(
(memory Code
(address (#x008000 . #x0080FF))
(section code)
(section cdata)
(section switch)
)
(memory Data
(address (#x008100 . #x0081FF))
(section near)
(section data)
(section znear)
(section zdata)
)
(memory Stack
(address (#x000100 . #x0001FF))
(section (stack #x00100))
)
(memory DirectPage
(address (#x000000 . #x0000FF))
(section
(registers #x000004)
(ztiny)
)
)
(block stack (size #x100)) ; machine stack size
(base-address _DirectPageStart DirectPage 0)
(base-address _NearBaseAddress Data 0)
))

15
config/kernel.scm
View File

@ -9,16 +9,17 @@
(section heap)
)
(memory BOOT
(address (#x008000 . #x0082FF))
(scatter-to boot_rom)
(section boot)
(memory LOROM
(address (#x008000 . #x00FFFF))
(scatter-to low_rom)
(section (boot #x008000))
(section irq_handlers)
)
(memory ROM
(address (#xC00000 . #xC0FFFF))
(section (boot_rom #xC08000))
(section (code #xC08300))
(section (low_rom #xC08000))
(section code)
(section farcode)
(section cdata)
(section switch)
@ -27,8 +28,6 @@
(section chuge)
(section ihuge)
(section data_init_table)
(section (irq_trampolines #xC0F000))
(section (irq_vectors #xC0FF80))
)
(memory Stack

4
src/kernel/boot.s
View File

@ -7,6 +7,8 @@
#include "sentinel65x.h"
.extern __program_root_section
.section boot, noreorder
.asciz "WDC"
w65c265s_init:
@ -54,4 +56,4 @@ delay_y
w65c265s_sram_off
// And we are booted enough to jump to high ROM.
jmp long:0xC08300
jmp long:__program_root_section

28
src/kernel/cop_trampoline.s Normal file
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@ -0,0 +1,28 @@
#include "macros.h"
.section znear,bss
cop_handler_result_c:
.space 2
cop_handler_result_x:
.space 2
cop_handler_result_y:
.space 2
.section `$$interruptVector_0x00ffb4`,text
.public cop_trampoline
.word cop_trampoline
.section irq_handlers,text
.extern cop_handler
cop_trampoline:
rep #48
; Simple calling convention: first argument in C, the rest on the stack.
phx
phy
call cop_handler
; And fetch the results:
lda cop_handler_result_c
ldx cop_handler_result_x
ldy cop_handler_result_y
rti

35
src/kernel/irq.c
View File

@ -7,23 +7,30 @@
#include <stdint.h>
// Return values from handlers, if any, should be stored in
// DP[0] for the C register, DP[4] for the X register, and
// DP[6] for the Y register.
extern uint16_t Dp[4];
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-parameter"
#pragma clang diagnostic ignored "-Wunused-variable"
#pragma clang section text="irq_handlers"
void cop_handler(uint16_t arg_c, uint16_t arg_x, uint16_t arg_y) {
switch (arg_c & 0x00FF) {
case 0:
//soft_reset();
break;
default:
//cop_error_invalid_call();
break;
}
// These are used by the COP trampoline to put the results
// into the C, X, and Y registers.
extern uint16_t cop_handler_result_c;
extern uint16_t cop_handler_result_x;
extern uint16_t cop_handler_result_y;
__attribute__((simple_call))
void cop_handler(uint16_t function,
uint16_t arg_x,
uint16_t arg_y) {
switch (function) {
case 0:
break;
default:
break;
}
return;
}
void irq_handler(void) {

374
src/kernel/irq_trampoline.s
View File

@ -1,374 +0,0 @@
//; SPDX-License-Identifier: MIT
//;
//; bios/irq_trampoline.s
//; IRQ trampoline code for Sentinel 65X
//;
//; The two sections below are visible in ROM when the CPU's
//; on-chip ROM is disabled. They must be copied to RAM if
//; on-board ROM is to be disabled.
//;
//;
//; Copyright © 2024 Kyle J Cardoza <Kyle.Cardoza@icloud.com>
#include "macros.h"
#include "sentinel65x.h"
.extern _Dp
.extern irq_handler
.extern cop_handler
; This section gets copied to 0x00F000
.section irq_trampolines
reserved_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
timer0_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
timer1_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
timer2_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
timer3_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
timer4_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
timer5_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
timer6_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
timer7_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
pe56_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
ne57_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
pe60_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
pe62_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
ne64_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
ne66_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
pib_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
level_irq:
phb
phd
rep #0b00110000
pha
phx
phy
call long:irq_handler
jump interrupt_return
uart_0_rx_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
uart_0_tx_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
uart_1_rx_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
uart_1_tx_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
uart_2_rx_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
uart_2_tx_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
uart_3_rx_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
uart_3_tx_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
cop_irq:
phb
phd
rep #0b00110000
stx _Dp+4
sty _Dp+6
call cop_handler
rep #0b00110000
lda _Dp+0
ldx _Dp+4
ldy _Dp+6
pld
plb
rti
brk_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
abort_irq:
phb
phd
rep #0b00110000
pha
phx
phy
jump interrupt_return
nmi_irq:
phb
phd
rep #0b00110000
pha
phx
phy
.extern nmi_handler
long_a
call long:nmi_handler
jump interrupt_return
interrupt_return:
rep #0b00110000
ply
plx
pla
pld
plb
jump interrupt_return
; This section gets copied to 0x00FF80
.section irq_vectors
; Native mode IRQ vectors
.word .word0(timer0_irq)
.word .word0(timer1_irq)
.word .word0(timer2_irq)
.word .word0(timer3_irq)
.word .word0(timer4_irq)
.word .word0(timer5_irq)
.word .word0(timer6_irq)
.word .word0(timer7_irq)
.word .word0(pe56_irq)
.word .word0(ne57_irq)
.word .word0(pe60_irq)
.word .word0(pe62_irq)
.word .word0(ne64_irq)
.word .word0(ne66_irq)
.word .word0(pib_irq)
.word .word0(level_irq)
.word .word0(uart_0_rx_irq)
.word .word0(uart_0_tx_irq)
.word .word0(uart_1_rx_irq)
.word .word0(uart_1_tx_irq)
.word .word0(uart_2_rx_irq)
.word .word0(uart_2_tx_irq)
.word .word0(uart_3_rx_irq)
.word .word0(uart_3_tx_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(cop_irq)
.word .word0(brk_irq)
.word .word0(abort_irq)
.word .word0(nmi_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
; Emulation mode is not supported right now.
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)
.word .word0(reserved_irq)