ebbce7507b
- after a trap to kernel, the code automatically switches to kernel stack, in the future local to the CPU - k_reenter variable replaced by a test whether the CS is kernel cs or not. The information is passed further if needed. Removes a global variable which would need to be cpu local - no need for global variables describing the exception or trap context. This information is kept on stack and a pointer to this structure is passed to the C code as a single structure - removed loadedcr3 variable and its use replaced by reading the %cr3 register - no need to redisable interrupts in restart() as they are already disabled. - unified handling of traps that push and don't push errorcode - removed save() function as the process context is not saved directly to process table but saved as required by the trap code. Essentially it means that save() code is inlined everywhere not only in the exception handling routine - returning from syscall is more arch independent - it sets the retger in C - top of the x86 stack contains the current CPU id and pointer to the currently scheduled process (the one right interrupted) so the mode switch code can find where to save the context without need to use proc_ptr which will be cpu local in the future and therefore difficult to access in assembler and expensive to access in general - some more clean up of level0 code. No need to read-back the argument passed in %eax from the proc structure. The mode switch code does not clobber %the general registers and hence we can just call what is in %eax - many assebly macros in sconst.h as they will be reused by the apic assembly
152 lines
5.5 KiB
C
152 lines
5.5 KiB
C
|
|
#ifndef _I386_PROTO_H
|
|
#define _I386_PROTO_H
|
|
|
|
/* Hardware interrupt handlers. */
|
|
_PROTOTYPE( void hwint00, (void) );
|
|
_PROTOTYPE( void hwint01, (void) );
|
|
_PROTOTYPE( void hwint02, (void) );
|
|
_PROTOTYPE( void hwint03, (void) );
|
|
_PROTOTYPE( void hwint04, (void) );
|
|
_PROTOTYPE( void hwint05, (void) );
|
|
_PROTOTYPE( void hwint06, (void) );
|
|
_PROTOTYPE( void hwint07, (void) );
|
|
_PROTOTYPE( void hwint08, (void) );
|
|
_PROTOTYPE( void hwint09, (void) );
|
|
_PROTOTYPE( void hwint10, (void) );
|
|
_PROTOTYPE( void hwint11, (void) );
|
|
_PROTOTYPE( void hwint12, (void) );
|
|
_PROTOTYPE( void hwint13, (void) );
|
|
_PROTOTYPE( void hwint14, (void) );
|
|
_PROTOTYPE( void hwint15, (void) );
|
|
|
|
/* Exception handlers (real or protected mode), in numerical order. */
|
|
void _PROTOTYPE( int00, (void) ), _PROTOTYPE( divide_error, (void) );
|
|
void _PROTOTYPE( int01, (void) ), _PROTOTYPE( single_step_exception, (void) );
|
|
void _PROTOTYPE( int02, (void) ), _PROTOTYPE( nmi, (void) );
|
|
void _PROTOTYPE( int03, (void) ), _PROTOTYPE( breakpoint_exception, (void) );
|
|
void _PROTOTYPE( int04, (void) ), _PROTOTYPE( overflow, (void) );
|
|
void _PROTOTYPE( int05, (void) ), _PROTOTYPE( bounds_check, (void) );
|
|
void _PROTOTYPE( int06, (void) ), _PROTOTYPE( inval_opcode, (void) );
|
|
void _PROTOTYPE( int07, (void) ), _PROTOTYPE( copr_not_available, (void) );
|
|
void _PROTOTYPE( double_fault, (void) );
|
|
void _PROTOTYPE( copr_seg_overrun, (void) );
|
|
void _PROTOTYPE( inval_tss, (void) );
|
|
void _PROTOTYPE( segment_not_present, (void) );
|
|
void _PROTOTYPE( stack_exception, (void) );
|
|
void _PROTOTYPE( general_protection, (void) );
|
|
void _PROTOTYPE( page_fault, (void) );
|
|
void _PROTOTYPE( copr_error, (void) );
|
|
|
|
/* Software interrupt handlers, in numerical order. */
|
|
_PROTOTYPE( void trp, (void) );
|
|
_PROTOTYPE( void syscall_entry, (void) );
|
|
_PROTOTYPE( void level0_call, (void) );
|
|
|
|
/* memory.c */
|
|
_PROTOTYPE( void i386_freepde, (int pde));
|
|
_PROTOTYPE( void getcr3val, (void));
|
|
_PROTOTYPE( void vm_set_cr3, (struct proc *));
|
|
|
|
|
|
/* exception.c */
|
|
struct exception_frame {
|
|
reg_t vector; /* which interrupt vector was triggered */
|
|
reg_t errcode; /* zero if no exception does not push err code */
|
|
reg_t eip;
|
|
reg_t cs;
|
|
reg_t eflags;
|
|
reg_t esp; /* undefined if trap is nested */
|
|
reg_t ss; /* undefined if trap is nested */
|
|
};
|
|
|
|
_PROTOTYPE( void exception, (struct exception_frame * frame));
|
|
|
|
/* klib386.s */
|
|
_PROTOTYPE( void level0, (void (*func)(void)) );
|
|
_PROTOTYPE( void monitor, (void) );
|
|
_PROTOTYPE( void reset, (void) );
|
|
_PROTOTYPE( void int86, (void) );
|
|
_PROTOTYPE( reg_t read_cr0, (void) );
|
|
_PROTOTYPE( reg_t read_cr2, (void) );
|
|
_PROTOTYPE( void write_cr0, (unsigned long value) );
|
|
_PROTOTYPE( unsigned long read_cr4, (void) );
|
|
_PROTOTYPE( void write_cr4, (unsigned long value) );
|
|
_PROTOTYPE( void write_cr3, (unsigned long value) );
|
|
_PROTOTYPE( unsigned long read_cpu_flags, (void) );
|
|
_PROTOTYPE( void phys_insb, (U16_t port, phys_bytes buf, size_t count) );
|
|
_PROTOTYPE( void phys_insw, (U16_t port, phys_bytes buf, size_t count) );
|
|
_PROTOTYPE( void phys_outsb, (U16_t port, phys_bytes buf, size_t count) );
|
|
_PROTOTYPE( void phys_outsw, (U16_t port, phys_bytes buf, size_t count) );
|
|
_PROTOTYPE( u32_t read_cr3, (void) );
|
|
_PROTOTYPE( void reload_cr3, (void) );
|
|
_PROTOTYPE( void phys_memset, (phys_bytes ph, u32_t c, phys_bytes bytes) );
|
|
|
|
/* protect.c */
|
|
struct tss_s {
|
|
reg_t backlink;
|
|
reg_t sp0; /* stack pointer to use during interrupt */
|
|
reg_t ss0; /* " segment " " " " */
|
|
reg_t sp1;
|
|
reg_t ss1;
|
|
reg_t sp2;
|
|
reg_t ss2;
|
|
reg_t cr3;
|
|
reg_t ip;
|
|
reg_t flags;
|
|
reg_t ax;
|
|
reg_t cx;
|
|
reg_t dx;
|
|
reg_t bx;
|
|
reg_t sp;
|
|
reg_t bp;
|
|
reg_t si;
|
|
reg_t di;
|
|
reg_t es;
|
|
reg_t cs;
|
|
reg_t ss;
|
|
reg_t ds;
|
|
reg_t fs;
|
|
reg_t gs;
|
|
reg_t ldt;
|
|
u16_t trap;
|
|
u16_t iobase;
|
|
/* u8_t iomap[0]; */
|
|
};
|
|
|
|
EXTERN struct tss_s tss;
|
|
|
|
_PROTOTYPE( void prot_init, (void) );
|
|
_PROTOTYPE( void idt_init, (void) );
|
|
_PROTOTYPE( void init_codeseg, (struct segdesc_s *segdp, phys_bytes base,
|
|
vir_bytes size, int privilege) );
|
|
_PROTOTYPE( void init_dataseg, (struct segdesc_s *segdp, phys_bytes base,
|
|
vir_bytes size, int privilege) );
|
|
_PROTOTYPE( void enable_iop, (struct proc *pp) );
|
|
_PROTOTYPE( int prot_set_kern_seg_limit, (vir_bytes limit) );
|
|
_PROTOTYPE( void printseg, (char *banner, int iscs, struct proc *pr, u32_t selector) );
|
|
_PROTOTYPE( u32_t read_cs, (void));
|
|
_PROTOTYPE( u32_t read_ds, (void));
|
|
_PROTOTYPE( u32_t read_ss, (void));
|
|
|
|
/* prototype of an interrupt vector table entry */
|
|
struct gate_table_s {
|
|
_PROTOTYPE( void (*gate), (void) );
|
|
unsigned char vec_nr;
|
|
unsigned char privilege;
|
|
};
|
|
|
|
EXTERN struct gate_table_s gate_table_pic[];
|
|
|
|
/* copies an array of vectors to the IDT. The last vector must be zero filled */
|
|
_PROTOTYPE(void idt_copy_vectors, (struct gate_table_s * first));
|
|
|
|
EXTERN void * k_boot_stktop;
|
|
_PROTOTYPE(void tss_init, (struct tss_s * tss, void * kernel_stack, unsigned cpu));
|
|
|
|
|
|
/* functions defined in architecture-independent kernel source. */
|
|
#include "../../proto.h"
|
|
|
|
#endif
|