/* vectors.s 1.1 - 95/12/04 * * This file contains the assembly code for the PowerPC 403 * interrupt veneers for RTEMS. * * Author: Andrew Bray * * COPYRIGHT (c) 1995 by i-cubed ltd. * * To anyone who acknowledges that this file is provided "AS IS" * without any express or implied warranty: * permission to use, copy, modify, and distribute this file * for any purpose is hereby granted without fee, provided that * the above copyright notice and this notice appears in all * copies, and that the name of i-cubed limited not be used in * advertising or publicity pertaining to distribution of the * software without specific, written prior permission. * i-cubed limited makes no representations about the suitability * of this software for any purpose. * */ /* * The issue with this file is getting it loaded at the right place. * The first vector MUST be at address 0x????0100. * How this is achieved is dependant on the tool chain. * * However the basic mechanism for ELF assemblers is to create a * section called ".vectors", which will be loaded to an address * between 0x????0000 and 0x????0100 (inclusive) via a link script. * * The basic mechanism for XCOFF assemblers is to place it in the * normal text section, and arrange for this file to be located * at an appropriate position on the linker command line. * * The variable 'PPC_VECTOR_FILE_BASE' must be defined to be the * offset from 0x????0000 to the first location in the file. This * will usually be 0x0000 or 0x0100. * * $Id$ */ #include /* PPC_VECTOR_FILE_BASE */ #include #ifndef PPC_VECTOR_FILE_BASE #error "PPC_VECTOR_FILE_BASE is not defined." #endif /* Where this file will be loaded */ .set file_base, PPC_VECTOR_FILE_BASE /* Offset to store reg 0 */ .set IP_LINK, 0 #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) .set IP_0, (IP_LINK + 56) #else .set IP_0, (IP_LINK + 8) #endif .set IP_2, (IP_0 + 4) .set IP_3, (IP_2 + 4) .set IP_4, (IP_3 + 4) .set IP_5, (IP_4 + 4) .set IP_6, (IP_5 + 4) .set IP_7, (IP_6 + 4) .set IP_8, (IP_7 + 4) .set IP_9, (IP_8 + 4) .set IP_10, (IP_9 + 4) .set IP_11, (IP_10 + 4) .set IP_12, (IP_11 + 4) .set IP_13, (IP_12 + 4) .set IP_28, (IP_13 + 4) .set IP_29, (IP_28 + 4) .set IP_30, (IP_29 + 4) .set IP_31, (IP_30 + 4) .set IP_CR, (IP_31 + 4) .set IP_CTR, (IP_CR + 4) .set IP_XER, (IP_CTR + 4) .set IP_LR, (IP_XER + 4) .set IP_PC, (IP_LR + 4) .set IP_MSR, (IP_PC + 4) .set IP_END, (IP_MSR + 16) /* Vector offsets */ .set begin_vector,0x0000 .set crit_vector,0x0100 .set mach_vector,0x0200 .set prot_vector,0x0300 .set ext_vector,0x0500 .set align_vector,0x0600 .set prog_vector,0x0700 .set dec_vector,0x0900 .set sys_vector,0x0C00 .set pit_vector,0x1000 .set fit_vector,0x1010 .set wadt_vector,0x1020 .set debug_vector,0x2000 /* Go to the right section */ #if PPC_ASM == PPC_ASM_ELF .section .vectors,"awx",@progbits #elif PPC_ASM == PPC_ASM_XCOFF .csect .text[PR] #endif PUBLIC_VAR (__vectors) SYM (__vectors): /* Critical error handling */ .org crit_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_CRIT b PROC (_ISR_HandlerC) /* Machine check exception */ .org mach_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_MCHECK b PROC (_ISR_HandlerC) /* Protection exception */ .org prot_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_PROTECT b PROC (_ISR_Handler) /* External interrupt */ .org ext_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_EXTERNAL b PROC (_ISR_Handler) /* Align exception */ .org align_vector - file_base .extern align_h b align_h /* Program exception */ .org prog_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_PROGRAM b PROC (_ISR_Handler) /* Decrementer exception */ .org dec_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_PROGRAM b PROC (_ISR_Handler) /* System call */ .org sys_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_SCALL b PROC (_ISR_Handler) /* PIT interrupt */ .org pit_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_PIT b PROC (_ISR_Handler) /* FIT interrupt */ .org fit_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_FIT b PROC (_ISR_Handler) /* Watchdog interrupt */ .org wadt_vector - file_base #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_WATCHDOG b PROC (_ISR_HandlerC) /* Debug exception */ debug: #if (PPC_ABI == PPC_ABI_POWEROPEN || PPC_ABI == PPC_ABI_GCC27) #if (PPC_HAS_FPU) stwu r1, -(20*4 + 18*8 + IP_END)(r1) #else stwu r1, -(20*4 + IP_END)(r1) #endif #else stwu r1, -(IP_END)(r1) #endif stw r0, IP_0(r1) li r0, PPC_IRQ_DEBUG b PROC (_ISR_HandlerC) /* Debug exception */ .org debug_vector - file_base b debug