6f77685609
mainly in the kernel and headers. This split based on work by Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture port. . kernel does not program the interrupt controller directly, do any other architecture-dependent operations, or contain assembly any more, but uses architecture-dependent functions in arch/$(ARCH)/. . architecture-dependent constants and types defined in arch/$(ARCH)/include. . <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now, architecture-independent functions. . int86, sdevio, readbios, and iopenable are now i386-specific kernel calls and live in arch/i386/do_* now. . i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have gone, and 'machine.protected' is gone (and always taken to be 1 in i386). If 86 support is to return, it should be a new architecture. . prototypes for the architecture-dependent functions defined in kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h . /etc/make.conf included in makefiles and shell scripts that need to know the building architecture; it defines ARCH=<arch>, currently only i386. . some basic per-architecture build support outside of the kernel (lib) . in clock.c, only dequeue a process if it was ready . fixes for new include files files deleted: . mpx/klib.s - only for choosing between mpx/klib86 and -386 . klib86.s - only for 86 i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/: . mpx386.s (entry point) . klib386.s . sconst.h . exception.c . protect.c . protect.h . i8269.c
103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
/* system dependent functions for use inside the whole kernel. */
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#include "../../kernel.h"
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#include <unistd.h>
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#include <ibm/cmos.h>
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#include <ibm/bios.h>
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#include <minix/portio.h>
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#include "proto.h"
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PUBLIC void arch_shutdown(int how)
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{
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/* Mask all interrupts, including the clock. */
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outb( INT_CTLMASK, ~0);
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if(how != RBT_RESET) {
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/* return to boot monitor */
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outb( INT_CTLMASK, 0);
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outb( INT2_CTLMASK, 0);
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/* Return to the boot monitor. Set
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* the program if not already done.
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*/
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if (how != RBT_MONITOR)
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phys_copy(vir2phys(""), kinfo.params_base, 1);
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level0(monitor);
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} else {
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/* Reset the system by forcing a processor shutdown. First stop
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* the BIOS memory test by setting a soft reset flag.
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*/
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u16_t magic = STOP_MEM_CHECK;
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phys_copy(vir2phys(&magic), SOFT_RESET_FLAG_ADDR,
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SOFT_RESET_FLAG_SIZE);
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level0(reset);
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}
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}
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PUBLIC void system_init(void)
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{
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prot_init();
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}
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#define COM1_BASE 0x3F8
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#define COM1_THR (COM1_BASE + 0)
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#define LSR_THRE 0x20
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#define COM1_LSR (COM1_BASE + 5)
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PUBLIC void ser_putc(char c)
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{
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int i;
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int lsr, thr;
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lsr= COM1_LSR;
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thr= COM1_THR;
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for (i= 0; i<100000; i++)
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{
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if (inb( lsr) & LSR_THRE)
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break;
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}
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outb( thr, c);
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}
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#if SPROFILE
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PUBLIC int arch_init_profile_clock(u32_t freq)
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{
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int r;
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/* Set CMOS timer frequency. */
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outb(RTC_INDEX, RTC_REG_A);
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outb(RTC_IO, RTC_A_DV_OK | freq);
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/* Enable CMOS timer interrupts. */
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outb(RTC_INDEX, RTC_REG_B);
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r = inb(RTC_IO);
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outb(RTC_INDEX, RTC_REG_B);
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outb(RTC_IO, r | RTC_B_PIE);
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/* Mandatory read of CMOS register to enable timer interrupts. */
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outb(RTC_INDEX, RTC_REG_C);
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inb(RTC_IO);
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return CMOS_CLOCK_IRQ;
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}
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PUBLIC void arch_stop_profile_clock(void)
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{
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int r;
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/* Disable CMOS timer interrupts. */
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outb(RTC_INDEX, RTC_REG_B);
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r = inb(RTC_IO);
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outb(RTC_INDEX, RTC_REG_B);
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outb(RTC_IO, r & !RTC_B_PIE);
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}
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PUBLIC void arch_ack_profile_clock(void)
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{
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/* Mandatory read of CMOS register to re-enable timer interrupts. */
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outb(RTC_INDEX, RTC_REG_C);
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inb(RTC_IO);
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}
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#endif
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