diff options
Diffstat (limited to 'kernel/old/isrs.S')
| -rw-r--r-- | kernel/old/isrs.S | 374 |
1 files changed, 0 insertions, 374 deletions
diff --git a/kernel/old/isrs.S b/kernel/old/isrs.S deleted file mode 100644 index f6bd662..0000000 --- a/kernel/old/isrs.S +++ /dev/null @@ -1,374 +0,0 @@ -/* -** @file isrs.S -** -** @author K. Reek -** @authors Jon Coles, Warren R. Carithers, Margaret Reek -** @author numerous Systems Programming classes -** -** Stubs for ISRs. -** -** This module provides the stubs needed for interrupts to save -** the machine state before calling the ISR. All interrupts have -** their own stub which pushes the interrupt number on the stack. -** This makes it possible for a common ISR to determine which -** interrupted occurred. -*/ - -#define ASM_SRC - -# .arch i386 - -#include <bootstrap.h> - -/* -** Configuration options - define in Makefile -** -** TRACE_CX include context restore debugging code -*/ - - .text - -/* -** Macros for the isr stubs. Some interrupts push an error code on -** the stack and others don't; for those that don't we simply push -** a zero so that cleaning up from either type is identical. -** -** Note: these are not marked as global symbols, as they are never -** accessed directly outside of this file. This could be changed -** if need be by adding this line to each macro definition right -** after the #define line: -** -** .global isr_##vector -*/ - -#define ISR(vector) \ -isr_##vector: ; \ - pushl $0 ; \ - pushl $vector ; \ - jmp isr_save - -#define ERR_ISR(vector) \ -isr_##vector: ; \ - pushl $vector ; \ - jmp isr_save - - .globl isr_table - .globl isr_restore - -/* -** This routine saves the machine state, calls the ISR, and then -** restores the machine state and returns from the interrupt. -** -******************************************************************** -******************************************************************** -** NOTE: this code is highly application-specific, and will most ** -** probably require modification to tailor it. ** -** ** -** Examples of mods: switch to/from user stack, context switch ** -** changes, etc. ** -******************************************************************** -******************************************************************** -*/ - -isr_save: - -/* -** Begin by saving the CPU state (except for the FP context information). -** -** At this point, the stack looks like this: -** -** esp -> vector # saved by the entry macro -** error code, or 0 saved by the hardware, or the entry macro -** saved EIP saved by the hardware -** saved CS saved by the hardware -** saved EFLAGS saved by the hardware -*/ - pusha // save E*X, ESP, EBP, ESI, EDI - pushl %ds // save segment registers - pushl %es - pushl %fs - pushl %gs - pushl %ss - -/* -** Stack contents (all 32-bit longwords) and offsets from ESP: -** -** SS GS FS ES DS EDI ESI EBP ESP EBX EDX ECX EAX vec cod EIP CS EFL -** 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 -** -** Note that the saved ESP is the contents before the PUSHA. -** -** Set up parameters for the ISR call. -*/ - movl 52(%esp),%eax // get vector number and error code - movl 56(%esp),%ebx - -/* -*********************** -** MOD FOR 20245 ** -*********************** -*/ - -/* -** We need to switch to the system stack. This requires that we save -** the user context pointer into the current PCB, then load ESP with -** the initial system stack pointer. -*/ - - .globl current - .globl kernel_esp - - // save the context pointer - movl current, %edx - movl %esp, (%edx) - - // also save the page directory pointer - movl %cr3, %ecx - movl %ecx, 4(%edx) - - // switch to the system stack - // - // NOTE: this is inherently non-reentrant! If/when the OS - // is converted from monolithic to something that supports - // reentrant or interruptable ISRs, this code will need to - // be changed to support that! - - movl kernel_esp, %esp - - // we don't change CR3 because all the user PDIRs are - // set up with mappings for the OS in the upper half - -/* -*********************** -** END MOD FOR 20245 ** -*********************** -*/ - - pushl %ebx // put them on the top of the stack ... - pushl %eax // ... as parameters for the ISR - -/* -** Call the ISR -*/ - movl isr_table(,%eax,4),%ebx - call *%ebx - addl $8,%esp // pop the two parameters - -/* -** Context restore begins here -*/ - -isr_restore: - -/* -*********************** -** MOD FOR 20245 ** -*********************** -*/ - movl current, %ebx // return to the user stack - movl (%ebx), %esp // ESP --> context save area - movl 4(%ebx), %ecx // page directory pointer - movl %ecx, %cr3 - - // now we're operating with the user process' - // page directory and stack - -/* -*********************** -** END MOD FOR 20245 ** -*********************** -*/ - -#ifdef TRACE_CX -/* -** DEBUGGING CODE PART 1 -** -** This code will execute during each context restore, and -** should be modified to print out whatever debugging information -** is desired. -** -** By default, it prints out the CPU context being restored; it -** relies on the standard save sequence (see above). -*/ - .globl cio_printf_at - - pushl $fmt - pushl $1 - pushl $0 - call cio_printf_at - addl $12,%esp -/* -** END OF DEBUGGING CODE PART 1 -*/ -#endif - -/* -** Restore the context. -*/ - popl %ss // restore the segment registers - popl %gs - popl %fs - popl %es - popl %ds - popa // restore others - addl $8, %esp // discard the error code and vector - iret // and return - -#ifdef TRACE_CX -/* -** DEBUGGING CODE PART 2 -** -** This format string is arranged according to the ordering of values -** in the context save area on the stack. -*/ -fmt: .ascii " ss=%08x gs=%08x fs=%08x es=%08x ds=%08x\n" - .ascii "edi=%08x esi=%08x ebp=%08x esp=%08x ebx=%08x\n" - .ascii "edx=%08x ecx=%08x eax=%08x vec=%08x cod=%08x\n" - .string "eip=%08x cs=%08x efl=%08x\n" - -/* -** END OF DEBUGGING CODE PART 2 -*/ -#endif - -/* -** Here we generate the individual stubs for each interrupt. -*/ -ISR(0x00); ISR(0x01); ISR(0x02); ISR(0x03); -ISR(0x04); ISR(0x05); ISR(0x06); ISR(0x07); -ERR_ISR(0x08); ISR(0x09); ERR_ISR(0x0a); ERR_ISR(0x0b); -ERR_ISR(0x0c); ERR_ISR(0x0d); ERR_ISR(0x0e); ISR(0x0f); -ISR(0x10); ERR_ISR(0x11); ISR(0x12); ISR(0x13); -ISR(0x14); ERR_ISR(0x15); ISR(0x16); ISR(0x17); -ISR(0x18); ISR(0x19); ISR(0x1a); ISR(0x1b); -ISR(0x1c); ISR(0x1d); ISR(0x1e); ISR(0x1f); -ISR(0x20); ISR(0x21); ISR(0x22); ISR(0x23); -ISR(0x24); ISR(0x25); ISR(0x26); ISR(0x27); -ISR(0x28); ISR(0x29); ISR(0x2a); ISR(0x2b); -ISR(0x2c); ISR(0x2d); ISR(0x2e); ISR(0x2f); -ISR(0x30); ISR(0x31); ISR(0x32); ISR(0x33); -ISR(0x34); ISR(0x35); ISR(0x36); ISR(0x37); -ISR(0x38); ISR(0x39); ISR(0x3a); ISR(0x3b); -ISR(0x3c); ISR(0x3d); ISR(0x3e); ISR(0x3f); -ISR(0x40); ISR(0x41); ISR(0x42); ISR(0x43); -ISR(0x44); ISR(0x45); ISR(0x46); ISR(0x47); -ISR(0x48); ISR(0x49); ISR(0x4a); ISR(0x4b); -ISR(0x4c); ISR(0x4d); ISR(0x4e); ISR(0x4f); -ISR(0x50); ISR(0x51); ISR(0x52); ISR(0x53); -ISR(0x54); ISR(0x55); ISR(0x56); ISR(0x57); -ISR(0x58); ISR(0x59); ISR(0x5a); ISR(0x5b); -ISR(0x5c); ISR(0x5d); ISR(0x5e); ISR(0x5f); -ISR(0x60); ISR(0x61); ISR(0x62); ISR(0x63); -ISR(0x64); ISR(0x65); ISR(0x66); ISR(0x67); -ISR(0x68); ISR(0x69); ISR(0x6a); ISR(0x6b); -ISR(0x6c); ISR(0x6d); ISR(0x6e); ISR(0x6f); -ISR(0x70); ISR(0x71); ISR(0x72); ISR(0x73); -ISR(0x74); ISR(0x75); ISR(0x76); ISR(0x77); -ISR(0x78); ISR(0x79); ISR(0x7a); ISR(0x7b); -ISR(0x7c); ISR(0x7d); ISR(0x7e); ISR(0x7f); -ISR(0x80); ISR(0x81); ISR(0x82); ISR(0x83); -ISR(0x84); ISR(0x85); ISR(0x86); ISR(0x87); -ISR(0x88); ISR(0x89); ISR(0x8a); ISR(0x8b); -ISR(0x8c); ISR(0x8d); ISR(0x8e); ISR(0x8f); -ISR(0x90); ISR(0x91); ISR(0x92); ISR(0x93); -ISR(0x94); ISR(0x95); ISR(0x96); ISR(0x97); -ISR(0x98); ISR(0x99); ISR(0x9a); ISR(0x9b); -ISR(0x9c); ISR(0x9d); ISR(0x9e); ISR(0x9f); -ISR(0xa0); ISR(0xa1); ISR(0xa2); ISR(0xa3); -ISR(0xa4); ISR(0xa5); ISR(0xa6); ISR(0xa7); -ISR(0xa8); ISR(0xa9); ISR(0xaa); ISR(0xab); -ISR(0xac); ISR(0xad); ISR(0xae); ISR(0xaf); -ISR(0xb0); ISR(0xb1); ISR(0xb2); ISR(0xb3); -ISR(0xb4); ISR(0xb5); ISR(0xb6); ISR(0xb7); -ISR(0xb8); ISR(0xb9); ISR(0xba); ISR(0xbb); -ISR(0xbc); ISR(0xbd); ISR(0xbe); ISR(0xbf); -ISR(0xc0); ISR(0xc1); ISR(0xc2); ISR(0xc3); -ISR(0xc4); ISR(0xc5); ISR(0xc6); ISR(0xc7); -ISR(0xc8); ISR(0xc9); ISR(0xca); ISR(0xcb); -ISR(0xcc); ISR(0xcd); ISR(0xce); ISR(0xcf); -ISR(0xd0); ISR(0xd1); ISR(0xd2); ISR(0xd3); -ISR(0xd4); ISR(0xd5); ISR(0xd6); ISR(0xd7); -ISR(0xd8); ISR(0xd9); ISR(0xda); ISR(0xdb); -ISR(0xdc); ISR(0xdd); ISR(0xde); ISR(0xdf); -ISR(0xe0); ISR(0xe1); ISR(0xe2); ISR(0xe3); -ISR(0xe4); ISR(0xe5); ISR(0xe6); ISR(0xe7); -ISR(0xe8); ISR(0xe9); ISR(0xea); ISR(0xeb); -ISR(0xec); ISR(0xed); ISR(0xee); ISR(0xef); -ISR(0xf0); ISR(0xf1); ISR(0xf2); ISR(0xf3); -ISR(0xf4); ISR(0xf5); ISR(0xf6); ISR(0xf7); -ISR(0xf8); ISR(0xf9); ISR(0xfa); ISR(0xfb); -ISR(0xfc); ISR(0xfd); ISR(0xfe); ISR(0xff); - - .data - -/* -** This table contains the addresses where each of the preceding -** stubs begins. This information is needed to initialize the -** Interrupt Descriptor Table in support.c -*/ - .globl isr_stub_table -isr_stub_table: - .long isr_0x00, isr_0x01, isr_0x02, isr_0x03 - .long isr_0x04, isr_0x05, isr_0x06, isr_0x07 - .long isr_0x08, isr_0x09, isr_0x0a, isr_0x0b - .long isr_0x0c, isr_0x0d, isr_0x0e, isr_0x0f - .long isr_0x10, isr_0x11, isr_0x12, isr_0x13 - .long isr_0x14, isr_0x15, isr_0x16, isr_0x17 - .long isr_0x18, isr_0x19, isr_0x1a, isr_0x1b - .long isr_0x1c, isr_0x1d, isr_0x1e, isr_0x1f - .long isr_0x20, isr_0x21, isr_0x22, isr_0x23 - .long isr_0x24, isr_0x25, isr_0x26, isr_0x27 - .long isr_0x28, isr_0x29, isr_0x2a, isr_0x2b - .long isr_0x2c, isr_0x2d, isr_0x2e, isr_0x2f - .long isr_0x30, isr_0x31, isr_0x32, isr_0x33 - .long isr_0x34, isr_0x35, isr_0x36, isr_0x37 - .long isr_0x38, isr_0x39, isr_0x3a, isr_0x3b - .long isr_0x3c, isr_0x3d, isr_0x3e, isr_0x3f - .long isr_0x40, isr_0x41, isr_0x42, isr_0x43 - .long isr_0x44, isr_0x45, isr_0x46, isr_0x47 - .long isr_0x48, isr_0x49, isr_0x4a, isr_0x4b - .long isr_0x4c, isr_0x4d, isr_0x4e, isr_0x4f - .long isr_0x50, isr_0x51, isr_0x52, isr_0x53 - .long isr_0x54, isr_0x55, isr_0x56, isr_0x57 - .long isr_0x58, isr_0x59, isr_0x5a, isr_0x5b - .long isr_0x5c, isr_0x5d, isr_0x5e, isr_0x5f - .long isr_0x60, isr_0x61, isr_0x62, isr_0x63 - .long isr_0x64, isr_0x65, isr_0x66, isr_0x67 - .long isr_0x68, isr_0x69, isr_0x6a, isr_0x6b - .long isr_0x6c, isr_0x6d, isr_0x6e, isr_0x6f - .long isr_0x70, isr_0x71, isr_0x72, isr_0x73 - .long isr_0x74, isr_0x75, isr_0x76, isr_0x77 - .long isr_0x78, isr_0x79, isr_0x7a, isr_0x7b - .long isr_0x7c, isr_0x7d, isr_0x7e, isr_0x7f - .long isr_0x80, isr_0x81, isr_0x82, isr_0x83 - .long isr_0x84, isr_0x85, isr_0x86, isr_0x87 - .long isr_0x88, isr_0x89, isr_0x8a, isr_0x8b - .long isr_0x8c, isr_0x8d, isr_0x8e, isr_0x8f - .long isr_0x90, isr_0x91, isr_0x92, isr_0x93 - .long isr_0x94, isr_0x95, isr_0x96, isr_0x97 - .long isr_0x98, isr_0x99, isr_0x9a, isr_0x9b - .long isr_0x9c, isr_0x9d, isr_0x9e, isr_0x9f - .long isr_0xa0, isr_0xa1, isr_0xa2, isr_0xa3 - .long isr_0xa4, isr_0xa5, isr_0xa6, isr_0xa7 - .long isr_0xa8, isr_0xa9, isr_0xaa, isr_0xab - .long isr_0xac, isr_0xad, isr_0xae, isr_0xaf - .long isr_0xb0, isr_0xb1, isr_0xb2, isr_0xb3 - .long isr_0xb4, isr_0xb5, isr_0xb6, isr_0xb7 - .long isr_0xb8, isr_0xb9, isr_0xba, isr_0xbb - .long isr_0xbc, isr_0xbd, isr_0xbe, isr_0xbf - .long isr_0xc0, isr_0xc1, isr_0xc2, isr_0xc3 - .long isr_0xc4, isr_0xc5, isr_0xc6, isr_0xc7 - .long isr_0xc8, isr_0xc9, isr_0xca, isr_0xcb - .long isr_0xcc, isr_0xcd, isr_0xce, isr_0xcf - .long isr_0xd0, isr_0xd1, isr_0xd2, isr_0xd3 - .long isr_0xd4, isr_0xd5, isr_0xd6, isr_0xd7 - .long isr_0xd8, isr_0xd9, isr_0xda, isr_0xdb - .long isr_0xdc, isr_0xdd, isr_0xde, isr_0xdf - .long isr_0xe0, isr_0xe1, isr_0xe2, isr_0xe3 - .long isr_0xe4, isr_0xe5, isr_0xe6, isr_0xe7 - .long isr_0xe8, isr_0xe9, isr_0xea, isr_0xeb - .long isr_0xec, isr_0xed, isr_0xee, isr_0xef - .long isr_0xf0, isr_0xf1, isr_0xf2, isr_0xf3 - .long isr_0xf4, isr_0xf5, isr_0xf6, isr_0xf7 - .long isr_0xf8, isr_0xf9, isr_0xfa, isr_0xfb - .long isr_0xfc, isr_0xfd, isr_0xfe, isr_0xff |