/* ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio. This file is part of ChibiOS. ChibiOS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. ChibiOS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ /** * @file ivor.s * @brief Kernel ISRs. * * @addtogroup PPC_GCC_CORE * @{ */ #if !defined(FALSE) || defined(__DOXYGEN__) #define FALSE 0 #endif #if !defined(TRUE) || defined(__DOXYGEN__) #define TRUE 1 #endif /* * Imports the PPC configuration headers. */ #define _FROM_ASM_ #include "nilconf.h" #include "nilcore.h" #if !defined(__DOXYGEN__) .section .handlers, "ax" #if PPC_SUPPORTS_DECREMENTER /* * _IVOR10 handler (Book-E decrementer). */ .align 4 .globl _IVOR10 .type _IVOR10, @function _IVOR10: /* Saving the external context (port_extctx structure).*/ stwu %sp, -80(%sp) #if PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI e_stmvsrrw 8(%sp) /* Saves PC, MSR. */ e_stmvsprw 16(%sp) /* Saves CR, LR, CTR, XER. */ e_stmvgprw 32(%sp) /* Saves GPR0, GPR3...GPR12. */ #else /* !(PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI) */ stw %r0, 32(%sp) /* Saves GPR0. */ mfSRR0 %r0 stw %r0, 8(%sp) /* Saves PC. */ mfSRR1 %r0 stw %r0, 12(%sp) /* Saves MSR. */ mfCR %r0 stw %r0, 16(%sp) /* Saves CR. */ mfLR %r0 stw %r0, 20(%sp) /* Saves LR. */ mfCTR %r0 stw %r0, 24(%sp) /* Saves CTR. */ mfXER %r0 stw %r0, 28(%sp) /* Saves XER. */ stw %r3, 36(%sp) /* Saves GPR3...GPR12. */ stw %r4, 40(%sp) stw %r5, 44(%sp) stw %r6, 48(%sp) stw %r7, 52(%sp) stw %r8, 56(%sp) stw %r9, 60(%sp) stw %r10, 64(%sp) stw %r11, 68(%sp) stw %r12, 72(%sp) #endif /* !(PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI) */ /* Increasing the SPGR0 register.*/ mfspr %r0, 272 eaddi %r0, %r0, 1 mtspr 272, %r0 /* Reset DIE bit in TSR register.*/ lis %r3, 0x0800 /* DIS bit mask. */ mtspr 336, %r3 /* TSR register. */ /* Restoring pre-IRQ MSR register value.*/ mfSRR1 %r0 #if !PPC_USE_IRQ_PREEMPTION /* No preemption, keeping EE disabled.*/ se_bclri %r0, 16 /* EE = bit 16. */ #endif mtMSR %r0 /* System tick handler invocation.*/ bl chSysTimerHandlerI #if PPC_USE_IRQ_PREEMPTION /* Prevents preemption again.*/ wrteei 0 #endif /* Jumps to the common IVOR epilogue code.*/ b _ivor_exit #endif /* PPC_SUPPORTS_DECREMENTER */ /* * _IVOR4 handler (Book-E external interrupt). */ .align 4 .globl _IVOR4 .type _IVOR4, @function _IVOR4: /* Saving the external context (port_extctx structure).*/ stwu %sp, -80(%sp) #if PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI e_stmvsrrw 8(%sp) /* Saves PC, MSR. */ e_stmvsprw 16(%sp) /* Saves CR, LR, CTR, XER. */ e_stmvgprw 32(%sp) /* Saves GPR0, GPR3...GPR12. */ #else /* !(PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI) */ stw %r0, 32(%sp) /* Saves GPR0. */ mfSRR0 %r0 stw %r0, 8(%sp) /* Saves PC. */ mfSRR1 %r0 stw %r0, 12(%sp) /* Saves MSR. */ mfCR %r0 stw %r0, 16(%sp) /* Saves CR. */ mfLR %r0 stw %r0, 20(%sp) /* Saves LR. */ mfCTR %r0 stw %r0, 24(%sp) /* Saves CTR. */ mfXER %r0 stw %r0, 28(%sp) /* Saves XER. */ stw %r3, 36(%sp) /* Saves GPR3...GPR12. */ stw %r4, 40(%sp) stw %r5, 44(%sp) stw %r6, 48(%sp) stw %r7, 52(%sp) stw %r8, 56(%sp) stw %r9, 60(%sp) stw %r10, 64(%sp) stw %r11, 68(%sp) stw %r12, 72(%sp) #endif /* !(PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI) */ /* Increasing the SPGR0 register.*/ mfspr %r0, 272 eaddi %r0, %r0, 1 mtspr 272, %r0 /* Software vector address from the INTC register.*/ lis %r3, INTC_IACKR_ADDR@h ori %r3, %r3, INTC_IACKR_ADDR@l lwz %r3, 0(%r3) /* IACKR register value. */ lwz %r3, 0(%r3) mtCTR %r3 /* Software handler address. */ /* Restoring pre-IRQ MSR register value.*/ mfSRR1 %r0 #if !PPC_USE_IRQ_PREEMPTION /* No preemption, keeping EE disabled.*/ se_bclri %r0, 16 /* EE = bit 16. */ #endif mtMSR %r0 /* Exectes the software handler.*/ bctrl #if PPC_USE_IRQ_PREEMPTION /* Prevents preemption again.*/ wrteei 0 #endif /* Informs the INTC that the interrupt has been served.*/ mbar 0 lis %r3, INTC_EOIR_ADDR@h ori %r3, %r3, INTC_EOIR_ADDR@l stw %r3, 0(%r3) /* Writing any value should do. */ /* Common IVOR epilogue code, context restore.*/ .globl _ivor_exit _ivor_exit: /* Decreasing the SPGR0 register.*/ mfspr %r0, 272 eaddi %r0, %r0, -1 mtspr 272, %r0 bl chSchRescheduleS /* Restoring the external context.*/ #if PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI e_lmvgprw 32(%sp) /* Restores GPR0, GPR3...GPR12. */ e_lmvsprw 16(%sp) /* Restores CR, LR, CTR, XER. */ e_lmvsrrw 8(%sp) /* Restores PC, MSR. */ #else /*!(PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI) */ lwz %r3, 36(%sp) /* Restores GPR3...GPR12. */ lwz %r4, 40(%sp) lwz %r5, 44(%sp) lwz %r6, 48(%sp) lwz %r7, 52(%sp) lwz %r8, 56(%sp) lwz %r9, 60(%sp) lwz %r10, 64(%sp) lwz %r11, 68(%sp) lwz %r12, 72(%sp) lwz %r0, 8(%sp) mtSRR0 %r0 /* Restores PC. */ lwz %r0, 12(%sp) mtSRR1 %r0 /* Restores MSR. */ lwz %r0, 16(%sp) mtCR %r0 /* Restores CR. */ lwz %r0, 20(%sp) mtLR %r0 /* Restores LR. */ lwz %r0, 24(%sp) mtCTR %r0 /* Restores CTR. */ lwz %r0, 28(%sp) mtXER %r0 /* Restores XER. */ lwz %r0, 32(%sp) /* Restores GPR0. */ #endif /* !(PPC_USE_VLE && PPC_SUPPORTS_VLE_MULTI) */ addi %sp, %sp, 80 /* Back to the previous frame. */ rfi #endif /* !defined(__DOXYGEN__) */ /** @} */