--- /dev/null
+
+CSRCS = devtty.c
+CSRCS += devices.c main.c libc.c
+
+ASRCS = pdp11.S crt0.S
+ASRCS += tricks.S
+
+DSRCS =
+DOBJS = $(patsubst ../dev/%.c,%.o, $(DSRCS))
+
+COBJS = $(CSRCS:.c=$(BINEXT))
+AOBJS = $(ASRCS:.S=.o)
+OBJS = $(COBJS) $(AOBJS) $(DOBJS)
+
+JUNK = $(CSRCS:.c=.o) $(ASRCS:.S=.o)
+
+all: $(OBJS)
+
+$(COBJS): %.o: %.c
+ $(CROSS_CC) $(CROSS_CCOPTS) -c $<
+
+$(AOBJS): %.o: %.S
+ $(CROSS_AS) $(ASOPTS) $< -o $*.o
+
+$(DOBJS): %.o: ../dev/%.c
+ $(CROSS_CC) $(CROSS_CCOPTS) -c $<
+
+clean:
+ rm -f $(OBJS) $(JUNK) core *~
+
+image:
+ $(CROSS_LD) -M -o fuzix.aout -T fuzix.ld \
+ crt0.o \
+ ../start.o ../version.o ../lowlevel-pdp11.o \
+ main.o ../swap.o ../timer.o ../simple.o ../kdata.o devices.o \
+ ../tty.o ../devio.o ../filesys.o ../process.o ../inode.o ../syscall_fs.o \
+ pdp11.o ../syscall_proc.o ../syscall_other.o ../mm.o \
+ ../devsys.o ../usermem.o ../syscall_exec16.o ../syscall_fs2.o \
+ tricks.o ../syscall_fs3.o \
+ ../usermem_std-pdp11.o devtty.o libc.o > ../fuzix.map
+ pdp11-aout-objcopy fuzix.aout -O binary ../fuzix.bin
--- /dev/null
+At the moment this is just build testing and seeing what in the toolchain
+breaks.
+
+Once it all builds and the syscall and some minimal driver code is filled in
+it ought to come in at about 20KW for a pure swap based system so probably
+not useful on an MMUless /11 except for testing.
--- /dev/null
+/* Enable to make ^Z dump the inode table for debug */
+#undef CONFIG_IDUMP
+/* Enable to make ^A drop back into the monitor */
+#undef CONFIG_MONITOR
+/* Profil syscall support (not yet complete) */
+#undef CONFIG_PROFIL
+
+#define CONFIG_MULTI
+#define CONFIG_SWAP_ONLY
+#define CONFIG_USERMEM_DIRECT
+#define CONFIG_BANKS 1
+#define PROC_SIZE 128 /* 64K, 128 * 512 */
+
+#define CONFIG_SPLIT_UDATA
+#define UDATA_SIZE 512
+#define UDATA_BLKS 1
+
+#define PROGBASE 0x8000UL
+#define PROGLOAD PROGBASE
+#define PROGTOP 0xE000UL
+#define SWAP_SIZE (130 + 2) /* 2 for the udata */
+#define SWAPBASE PROGBASE
+#define SWAPTOP 0xE000UL
+#define MAX_SWAPS PTABSIZE /* Mandatory for swap only */
+#define swap_map(x) ((uint8_t *)(x))
+
+#define SWAPDEV (1)
+
+#define TICKSPERSEC 50 /* Ticks per second */
+
+#define BOOT_TTY (512 + 1) /* Set this to default device for stdio, stderr */
+ /* In this case, the default is the first TTY device */
+ /* Temp FIXME set to serial port for debug ease */
+
+/* We need a tidier way to do this from the loader */
+#define CMDLINE NULL /* Location of root dev name */
+
+/* Device parameters */
+#define NUM_DEV_TTY 1
+#define TTYDEV BOOT_TTY /* Device used by kernel for messages, panics */
+#define NBUFS 6 /* Number of block buffers */
+#define NMOUNTS 2 /* Number of mounts at a time */
--- /dev/null
+
+ .globl __end
+ .globl __bss_start
+
+_start:
+ bis 0340,0177776 /* IRQs off */
+ mov $_udata+512,sp /* Set kernel stack */
+ mov $__bss_start,r0
+1: /* Wipe BSS */
+ clr (r0)+
+ cmp r0,$__end
+ ble 1b
+ jsr pc,init_early
+ jsr pc,init_hardware
+ jsr pc,_fuzix_main
+ bis 0340,0177776
+2:
+ jmp 2b
--- /dev/null
+#ifndef __DEVICE_DOT_H__
+#define __DEVICE_DOT_H__
+
+extern void mod_control(uint8_t set, uint8_t clr);
+
+#endif /* __DEVICE_DOT_H__ */
--- /dev/null
+#include <kernel.h>
+#include <version.h>
+#include <kdata.h>
+#include <devsys.h>
+#include <tty.h>
+#include <vt.h>
+
+struct devsw dev_tab[] = /* The device driver switch table */
+{
+// minor open close read write ioctl
+// -----------------------------------------------------------------
+ /* 0: /dev/hd Disc block devices */
+ { nxio_open, no_close, no_rdwr, no_rdwr, no_ioctl },
+ /* 1: /dev/fd Hard disc block devices (absent) */
+ { nxio_open, no_close, no_rdwr, no_rdwr, no_ioctl },
+ /* 2: /dev/tty TTY devices */
+ { tty_open, tty_close, tty_read, tty_write, tty_ioctl },
+ /* 3: /dev/lpr Printer devices */
+ { no_open, no_close, no_rdwr, no_rdwr, no_ioctl },
+ /* 4: /dev/mem etc System devices (one offs) */
+ { no_open, no_close, sys_read, sys_write, sys_ioctl },
+ /* Pack to 7 with nxio if adding private devices and start at 8 */
+};
+
+bool validdev(uint16_t dev)
+{
+ /* This is a bit uglier than needed but the right hand side is
+ a constant this way */
+ if(dev > ((sizeof(dev_tab)/sizeof(struct devsw)) << 8) + 255)
+ return false;
+ else
+ return true;
+}
+
+void device_init(void)
+{
+ int i;
+
+ for (i = 1; i <= MAX_SWAPS; i++)
+ swapmap_add(i);
+}
--- /dev/null
+#include <kernel.h>
+#include <kdata.h>
+#include <printf.h>
+#include <stdbool.h>
+#include <devtty.h>
+#include <device.h>
+#include <tty.h>
+
+volatile uint8_t *uart_data = (volatile uint8_t *)0xF03000; /* UART data */
+volatile uint8_t *uart_status = (volatile uint8_t *)0xF03010; /* UART status */
+
+unsigned char tbuf1[TTYSIZ];
+
+struct s_queue ttyinq[NUM_DEV_TTY + 1] = { /* ttyinq[0] is never used */
+ {NULL, NULL, NULL, 0, 0, 0},
+ {tbuf1, tbuf1, tbuf1, TTYSIZ, 0, TTYSIZ / 2},
+};
+
+/* Output for the system console (kprintf etc) */
+void kputchar(char c)
+{
+ if (c == '\n')
+ tty_putc(1, '\r');
+ tty_putc(1, c);
+}
+
+ttyready_t tty_writeready(uint8_t minor)
+{
+ uint8_t c = *uart_status;
+ return (c & 2) ? TTY_READY_NOW : TTY_READY_SOON; /* TX DATA empty */
+}
+
+void tty_putc(uint8_t minor, unsigned char c)
+{
+ *uart_data = c; /* Data */
+}
+
+void tty_setup(uint8_t minor)
+{
+}
+
+int tty_carrier(uint8_t minor)
+{
+ return 1;
+}
+
+void tty_sleeping(uint8_t minor)
+{
+}
+
+/* Currently run off the timer */
+void tty_interrupt(void)
+{
+ uint8_t r = *uart_status;
+ if (r & 1) {
+ r = *uart_data;
+ tty_inproc(1,r);
+ }
+}
+
+void platform_interrupt(void)
+{
+ timer_interrupt();
+ tty_interrupt();
+}
--- /dev/null
+#ifndef __DEVTTY_DOT_H__
+#define __DEVTTY_DOT_H__
+
+#define KEY_ROWS 8
+#define KEY_COLS 7
+extern uint8_t keymap[8];
+extern uint8_t keyboard[8][7];
+extern uint8_t shiftkeyboard[8][7];
+
+#endif
--- /dev/null
+#include "cpu.h"
+
+void *memcpy(void *d, const void *s, size_t sz)
+{
+ unsigned char *dp = d;
+ const unsigned char *sp = s;
+ while(sz--)
+ *dp++=*sp++;
+ return d;
+}
+
+void *memset(void *d, int c, size_t sz)
+{
+ unsigned char *p = d;
+ while(sz--)
+ *p++ = c;
+ return d;
+}
+
+size_t strlen(const char *p)
+{
+ const char *e = p;
+ while(*e++);
+ return e-p-1;
+}
+
+int memcmp(const void *a, const void *b, size_t n)
+{
+ const uint8_t *ap = a;
+ const uint8_t *bp = b;
+ while(n--) {
+ if (*ap < *bp)
+ return -1;
+ if (*ap != *bp)
+ return 1;
+ ap++;
+ bp++;
+ }
+ return 0;
+}
--- /dev/null
+#include <kernel.h>
+#include <timer.h>
+#include <kdata.h>
+#include <printf.h>
+#include <devtty.h>
+#include <buddy.h>
+
+void platform_idle(void)
+{
+ /* FIXME: disable IRQ, run tty interrupt, re-enable ? */
+}
+
+void do_beep(void)
+{
+}
+
+/*
+ * MMU initialize
+ */
+
+void map_init(void)
+{
+}
+
+uaddr_t ramtop;
+uint8_t need_resched;
+
+uint8_t platform_param(char *p)
+{
+ return 0;
+}
+
+void platform_discard(void)
+{
+}
+
+void memzero(void *p, usize_t len)
+{
+ memset(p, 0, len);
+}
+
+uint16_t irqstack[128]; /* Used for swapping only */
--- /dev/null
+ .text
+ .globl _program_vectors
+ .globl _trap_monitor
+ .globl _trap_reboot
+ .globl outchar
+ .globl init_hardware
+ .globl init_early
+
+init_early:
+_program_vectors:
+ rts pc
+
+_trap_monitor:
+_trap_reboot:
+ jmp _trap_reboot
+
+/* .data FOR now */
+ .even
+ .globl _udata
+
+_udata:
+ .= . + 512
+
+
+ .text
+
+/*
+ * KL11 and equivalents BR 4 vec 064 (tx) 060 (rx)
+ */
+
+outchar:
+ bit $0x8000,0177564 /* test bit 7 of TCSR (tx ready) */
+ beq outchar
+ mov r0,0177566
+ rts pc
+
+init_hardware:
+ /* FIXME: set up traps */
+ /* FIXME: make up some numbers for the moment */
+ mov $512,r0
+ mov r0,_ramsize
+ sub $64,r0
+ mov r0,_procmem
+ /* KW11: Enable IRQ at 0100 every line frequency tick BR 6 vec 100 */
+ mov $0x4000,0177546
+ rts pc
+
--- /dev/null
+export CPU = pdp11
--- /dev/null
+#include "../kernel-pdp11.def"
+
+ .text
+
+ .globl _switchin
+ .globl _switchout
+ .globl _dofork
+
+_switchout:
+ bis 0340,0177776
+ jsr pc,_chksigs
+ clr -(sp)
+ mov r5,-(sp)
+ mov r4,-(sp)
+ mov r3,-(sp)
+ mov r2,-(sp)
+ mov r1,-(sp)
+#ifndef CONFIG_PDP11_04
+ mov 0177717,-(sp) /* User stack ptr if not 11/04 */
+#endif
+ mov sp,_udata+U_DATA__U_SP
+ jsr pc,_getproc
+ mov r0,-(sp)
+ jsr pc,_switchin
+ jmp _trap_monitor
+
+/* Simple swap based to begin with */
+_switchin:
+ bis 0340,0177776
+ mov 2(sp),r0
+ tst P_TAB__P_PAGE_OFFSET(r0)
+ bne not_swapped
+ mov _udata+U_DATA__U_PTAB,r1
+ tst P_TAB__P_PAGE_OFFSET(r1)
+ /* FIXME: irqs on for swap needed yet */
+ beq its_dead_jim
+ mov r0,-(sp)
+ mov r1,-(sp)
+ jsr pc,_swapout
+ mov (sp)+,r0
+ mov (sp)+,r0
+its_dead_jim:
+ mov sp,r1
+ mov $swapstack,sp
+ mov r1,-(sp)
+ mov r0,-(sp)
+ mov r0,-(sp)
+ jsr pc,_swapper
+ mov (sp)+,r0
+ mov (sp)+,r0
+ mov $1,P_TAB__P_PAGE_OFFSET(r0)
+ mov -(sp),sp
+ bis 0340,0177776
+not_swapped:
+ cmp _udata+U_DATA__U_PTAB,r0
+ bne switchfail
+ movb $P_RUNNING,P_TAB__P_STATUS_OFFSET(r0)
+ clr _runticks
+ mov _udata+U_DATA__U_SP,sp
+#ifndef CONFIG_PDP11_04
+ mov (sp)+,0177717 /* User stack ptr if not 11/04 */
+ /* TODO - user MMU state */
+#endif
+ mov (sp)+,r1
+ mov (sp)+,r2
+ mov (sp)+,r3
+ mov (sp)+,r4
+ mov (sp)+,r5
+ mov (sp)+,r0
+ rts pc
+switchfail:
+ jsr pc,outr0hex
+ mov $badswitchmsg,r0
+ jsr pc,outstring
+ jmp _trap_monitor
+
+_dofork:
+ mov 2(sp),r0
+ mov r5,-(sp)
+ mov r4,-(sp)
+ mov r3,-(sp)
+ mov r2,-(sp)
+ mov r1,-(sp)
+#ifndef CONFIG_PDP11_04
+ mov 0177717,-(sp) /* User stack ptr if not 11/04 */
+ /* TODO - user MMU state */
+#endif
+ mov P_TAB__P_PID_OFFSET(r0),-(sp)
+ mov sp,_udata+U_DATA__U_SP
+ mov _udata+U_DATA__U_PTAB,-(sp)
+ jsr pc,_swapout
+ add $14,sp
+ tst r0
+ bne forked_up
+ mov 2(sp),-(sp)
+ jsr pc,_newproc
+ add $2,sp
+ clr r0
+ clr _runticks
+ rts pc
+forked_up:
+ mov $-1,r0
+ rts pc
+
+/* .data For now: no split I/D yet */
+badswitchmsg:
+ .ascii "_switchin: FAIL"
+ .byte 13,10,0
+ .even
+swapstack:
+ .= .+256
public / FUZIX.git / commitdiff