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-rw-r--r--kernel/kernel.c399
1 files changed, 2 insertions, 397 deletions
diff --git a/kernel/kernel.c b/kernel/kernel.c
index ce2e9dd..075c878 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -1,400 +1,5 @@
-/**
-** @file kernel.c
-**
-** @author CSCI-452 class of 20245
-**
-** @brief Kernel support routines
-*/
-#define KERNEL_SRC
-#include <common.h>
-#include <cio.h>
-#include <clock.h>
-#include <kmem.h>
-#include <procs.h>
-#include <sio.h>
-#include <syscalls.h>
-#include <user.h>
-#include <userids.h>
-#include <vm.h>
-
-/*
-** PRIVATE DEFINITIONS
-*/
-
-/*
-** PRIVATE DATA TYPES
-*/
-
-/*
-** PRIVATE GLOBAL VARIABLES
-*/
-
-/*
-** PUBLIC GLOBAL VARIABLES
-*/
-
-// character buffers, usable throughout the OS
-// nto guaranteed to retain their contents across an exception return
-char b256[256]; // primarily used for message creation
-char b512[512]; // used by PANIC macro
-
-/*
-** PRIVATE FUNCTIONS
-*/
-
-/*
-** PRIVATE FUNCTIONS
-*/
-
-/**
-** report - report the system configuration
-**
-** Prints configuration information about the OS on the console monitor.
-**
-** @param dtrace Decode the TRACE options
-*/
-static void kreport(bool_t dtrace)
-{
- cio_puts("\n-------------------------------\n");
- cio_printf("Config: N_PROCS = %d", N_PROCS);
- cio_printf(" N_PRIOS = %d", N_PRIOS);
- cio_printf(" N_STATES = %d", N_STATES);
- cio_printf(" CLOCK = %dHz\n", CLOCK_FREQ);
-
- // This code is ugly, but it's the simplest way to
- // print out the values of compile-time options
- // without spending a lot of execution time at it.
-
- cio_puts("Options: "
-#ifdef RPT_INT_UNEXP
- " R-uint"
-#endif
-#ifdef RPT_INT_MYSTERY
- " R-mint"
-#endif
-#ifdef TRACE_CX
- " CX"
-#endif
-#ifdef CONSOLE_STATS
- " Cstats"
-#endif
- ); // end of cio_puts() call
-
-#ifdef SANITY
- cio_printf(" SANITY = %d", SANITY);
-#endif
-#ifdef STATUS
- cio_printf(" STATUS = %d", STATUS);
-#endif
-
-#if TRACE > 0
- cio_printf(" TRACE = 0x%04x\n", TRACE);
-
- // decode the trace settings if that was requested
- if (TRACING_SOMETHING && dtrace) {
- // this one is simpler - we rely on string literal
- // concatenation in the C compiler to create one
- // long string to print out
-
- cio_puts("Tracing:"
-#if TRACING_PCB
- " PCB"
-#endif
-#if TRACING_VM
- " VM"
-#endif
-#if TRACING_QUEUE
- " QUE"
-#endif
-#if TRACING_SCHED
- " SCHED"
-#endif
-#if TRACING_DISPATCH
- " DISPATCH"
-#endif
-#if TRACING_SYSCALLS
- " SCALL"
-#endif
-#if TRACING_SYSRETS
- " SRET"
-#endif
-#if TRACING_EXIT
- " EXIT"
-#endif
-#if TRACING_INIT
- " INIT"
-#endif
-#if TRACING_KMEM
- " KM"
-#endif
-#if TRACING_KMEM_FREELIST
- " KMFL"
-#endif
-#if TRACING_KMEM_INIT
- " KMIN"
-#endif
-#if TRACING_FORK
- " FORK"
-#endif
-#if TRACING_EXEC
- " EXEC"
-#endif
-#if TRACING_SIO_STAT
- " S_STAT"
-#endif
-#if TRACING_SIO_ISR
- " S_ISR"
-#endif
-#if TRACING_SIO_RD
- " S_RD"
-#endif
-#if TRACING_SIO_WR
- " S_WR"
-#endif
-#if TRACING_USER
- " USER"
-#endif
-#if TRACING_ELF
- " ELF"
-#endif
- ); // end of cio_puts() call
- }
-#endif /* TRACE > 0 */
-
- cio_putchar('\n');
-}
-
-#if defined(CONSOLE_STATS)
-/**
-** stats - callback routine for console statistics
-**
-** Called by the CIO module when a key is pressed on the
-** console keyboard. Depending on the key, it will print
-** statistics on the console display, or will cause the
-** user shell process to be dispatched.
-**
-** This code runs as part of the CIO ISR.
-*/
-static void stats(int code)
-{
- switch (code) {
- case 'a': // dump the active table
- ptable_dump("\nActive processes", false);
- break;
-
- case 'c': // dump context info for all active PCBs
- ctx_dump_all("\nContext dump");
- break;
-
- case 'p': // dump the active table and all PCBs
- ptable_dump("\nActive processes", true);
- break;
-
- case 'q': // dump the queues
- // code to dump out any/all queues
- pcb_queue_dump("R", ready, true);
- pcb_queue_dump("W", waiting, true);
- pcb_queue_dump("S", sleeping, true);
- pcb_queue_dump("Z", zombie, true);
- pcb_queue_dump("I", sioread, true);
- break;
-
- case 'r': // print system configuration information
- report(true);
- break;
-
- // ignore CR and LF
- case '\r': // FALL THROUGH
- case '\n':
- break;
-
- default:
- cio_printf("console: unknown request '0x%02x'\n", code);
- // FALL THROUGH
-
- case 'h': // help message
- cio_puts("\nCommands:\n"
- " a -- dump the active table\n"
- " c -- dump contexts for active processes\n"
- " h -- this message\n"
- " p -- dump the active table and all PCBs\n"
- " q -- dump the queues\n"
- " r -- print system configuration\n");
- break;
- }
-}
-#endif
-
-/*
-** PUBLIC FUNCTIONS
-*/
-
-/**
-** main - system initialization routine
-**
-** Called by the startup code immediately before returning into the
-** first user process.
-**
-** Making this type 'int' keeps the compiler happy.
-*/
-int main(void)
-{
- /*
- ** BOILERPLATE CODE - taken from basic framework
- **
- ** Initialize interrupt stuff.
- */
-
- init_interrupts(); // IDT and PIC initialization
-
- /*
- ** Console I/O system.
- **
- ** Does not depend on the other kernel modules, so we can
- ** initialize it before we initialize the kernel memory
- ** and queue modules.
- */
-
-#if defined(CONSOLE_STATS)
- cio_init(stats);
-#else
- cio_init(NULL); // no console callback routine
-#endif
-
- cio_clearscreen(); // wipe out whatever is there
-
- /*
- ** TERM-SPECIFIC CODE STARTS HERE
- */
-
- /*
- ** Initialize various OS modules
- **
- ** Other modules (clock, SIO, syscall, etc.) are expected to
- ** install their own ISRs in their initialization routines.
- */
-
- cio_puts("System initialization starting.\n");
- cio_puts("-------------------------------\n");
-
- cio_puts("Modules:");
-
- // call the module initialization functions, being
- // careful to follow any module precedence requirements
-
- km_init(); // MUST BE FIRST
-#if TRACING_KMEM || TRACING_KMEM_FREE
- delay(DELAY_2_SEC); // approximately
-#endif
-
- // other module initialization calls here
- clk_init(); // clock
- pcb_init(); // process (PCBs, queues, scheduler)
-#if TRACING_PCB
- delay(DELAY_2_SEC);
-#endif
- sio_init(); // serial i/o
- sys_init(); // system call
-#if TRACING_SYSCALLS || TRACING_SYSRETS
- delay(DELAY_2_SEC);
-#endif
- vm_init(); // virtual memory
- user_init(); // user code handling
-
- cio_puts("\nModule initialization complete.\n");
-
- // report our configuration options
- kreport(true);
- cio_puts("-------------------------------\n");
-
- delay(DELAY_2_SEC);
-
- /*
- ** Other tasks typically performed here:
- **
- ** Enabling any I/O devices (e.g., SIO xmit/rcv)
- */
-
- /*
- ** Create the initial user process
- **
- ** This code is largely stolen from the fork() and exec()
- ** implementations in syscalls.c; if those change, this must
- ** also change.
- */
-
- // if we can't get a PCB, there's no use continuing!
- assert(pcb_alloc(&init_pcb) == SUCCESS);
-
- // fill in the necessary details
- init_pcb->pid = PID_INIT;
- init_pcb->state = STATE_NEW;
- init_pcb->priority = PRIO_HIGH;
-
- // find the 'init' program
- prog_t *prog = user_locate(Init);
- assert(prog != NULL);
-
- // command-line arguments for 'init'
- const char *args[2] = { "init", NULL };
-
- // load it
- assert(user_load(prog, init_pcb, args, true) == SUCCESS);
-
- // send it on its merry way
- schedule(init_pcb);
- dispatch();
-
-#ifdef TRACE_CX
- // if we're using a scrolling region, wait a bit more and then set it up
- delay(DELAY_7_SEC);
-
- // define a scrolling region in the top 7 lines of the screen
- cio_setscroll(0, 7, 99, 99);
-
- // clear it
- cio_clearscroll();
-
- // clear the top line
- cio_puts_at(
- 0, 0,
- "* ");
- // separator
- cio_puts_at(
- 0, 6,
- "================================================================================");
-#endif
-
- /*
- ** END OF TERM-SPECIFIC CODE
- **
- ** Finally, report that we're all done.
- */
-
- cio_puts("System initialization complete.\n");
- cio_puts("-------------------------------\n");
-
- sio_enable(SIO_RX);
-
-#if 0
- // produce a "system state" report
- cio_puts( "System status: Queues " );
- pcb_queue_dump( "R", ready, true );
- pcb_queue_dump( "W", waiting, true );
- pcb_queue_dump( "S", sleeping, true );
- pcb_queue_dump( "Z", zombie, true );
- pcb_queue_dump( "I", sioread, true );
- ptable_dump_counts();
- pcb_dump( "Current: ", current, true );
-
- delay( DELAY_3_SEC );
-
- vm_print( current->pdir, true, TwoLevel );
-
- delay( DELAY_3_SEC );
-#endif
-
- return 0;
+void main(void) {
+ while (1) ;
}
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