/**************************************************************************** * arch/sparc/include/sparc_v8/irq.h * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /* This file should never be included directed but, rather, only indirectly * through nuttx/irq.h */ #ifndef __ARCH_SPARC_INCLUDE_SPARC_V8_IRQ_H #define __ARCH_SPARC_INCLUDE_SPARC_V8_IRQ_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ /* The global pointer (GP) does not need to be saved in the "normal," flat * NuttX build. However, it would be necessary to save the GP if this is * a KERNEL build or if NXFLAT is supported. */ #undef SPARC_V8_SAVE_GP #if defined(CONFIG_BUILD_KERNEL) || defined(CONFIG_NXFLAT) # define SPARC_V8_SAVE_GP 1 #endif /* If this is a kernel build, how many nested system calls should support? */ #ifndef CONFIG_SYS_NNEST # define CONFIG_SYS_NNEST 2 #endif /* Register save state structure ********************************************/ #define REG_R1 (3) /* R1 */ #define REG_R2 (4) /* R2 */ #define REG_R3 (5) /* R3 */ #define REG_R4 (6) /* R4 */ #define REG_R5 (7) /* R5 */ #define REG_R6 (8) /* R6 */ #define REG_R7 (9) /* R7 */ #define REG_R8 (10) /* R8 */ #define REG_R9 (11) /* R9 */ #define REG_R10 (12) /* R10 */ #define REG_R11 (13) /* R11 */ #define REG_R12 (14) /* R12 */ #define REG_R13 (15) /* R13 */ #define REG_R14 (16) /* R14 */ #define REG_R15 (17) /* R15 */ #define REG_R16 (52) /* R16 */ #define REG_R17 (53) /* R17 */ #define REG_R18 (54) /* R18 */ #define REG_R19 (55) /* R19 */ #define REG_R20 (56) /* R20 */ #define REG_R21 (57) /* R21 */ #define REG_R22 (58) /* R22 */ #define REG_R23 (59) /* R23 */ #define REG_R24 (60) /* R24 */ #define REG_R25 (61) /* R25 */ #define REG_R26 (62) /* R26 */ #define REG_R27 (63) /* R27 */ #define REG_R28 (64) /* R28 */ #define REG_R29 (65) /* R29 */ #define REG_R30 (66) /* R30 */ #define REG_R31 (67) /* R31 */ #define REG_R32 (0) /* R32 */ #define REG_R33 (1) /* R33 */ #define REG_R34 (2) /* R34 */ #define REG_R35 (18) /* R35 */ #define REG_R36 (19) /* R36 */ #define XCPTCONTEXT_REGS (68) #define XCPTCONTEXT_SIZE (4 * XCPTCONTEXT_REGS) /* Alternate register names *************************************************/ /* %psr: processor status register */ #define REG_PSR (0) /* %pc: pc register */ #define REG_PC (1) /* %npc: npc register */ #define REG_NPC (2) /* %g1: global 1 */ #define REG_G1 (3) /* %g2: global 2 (reserved for application) */ #define REG_G2 (4) /* %g3: global 3 (reserved for application) */ #define REG_G3 (5) /* %g4: global 4 (reserved for application) */ #define REG_G4 (6) /* %g5: global 5 (reserved for system) */ #define REG_G5 (7) /* %g6: global 5 (reserved for system) */ #define REG_G6 (8) /* %g7: global 5 (reserved for system) */ #define REG_G7 (9) /* %i0: incoming param 0, outgoing return value */ #define REG_I0 (10) /* %i1: incoming param 1 */ #define REG_I1 (11) /* %i2: incoming param 2 */ #define REG_I2 (12) /* %i3: incoming param 3 */ #define REG_I3 (13) /* %i4: incoming param 4 */ #define REG_I4 (14) /* %i5: incoming param 5 */ #define REG_I5 (15) /* %i6: frame pointer */ #define REG_I6 (16) /* %i7: return address - 8 */ #define REG_I7 (17) #define REG_Y (18) #define REG_FSR (19) /* %l0: loacal 0 */ #define REG_L0 (52) /* %l1: loacal 1 */ #define REG_L1 (53) /* %l2: loacal 2 */ #define REG_L2 (54) /* %l3: loacal 3 */ #define REG_L3 (55) /* %l4: loacal 4 */ #define REG_L4 (56) /* %l5: loacal 5 */ #define REG_L5 (57) /* %l6: loacal 6 */ #define REG_L6 (58) /* %l7: loacal 7 */ #define REG_L7 (59) /* %o0: outgoing param 0, incoming return value */ #define REG_O0 (60) /* %o1: outgoing param 1 */ #define REG_O1 (61) /* %o2: outgoing param 2 */ #define REG_O2 (62) /* %o3: outgoing param 3 */ #define REG_O3 (63) /* %o4: outgoing param 4 */ #define REG_O4 (64) /* %o5: outgoing param 5 */ #define REG_O5 (65) /* %o6: stack pointer */ #define REG_O6 (66) /* %o7: address of call instruction, temporary */ #define REG_O7 (67) /* SPARC Software Trap number definitions */ #define SPARC_SWTRAP_SYSCALL 0 #define SPARC_SWTRAP_IRQDIS 9 #define SPARC_SWTRAP_IRQEN 10 /* PSR masks and starting bit positions * NOTE: Reserved bits are ignored. */ #define SPARC_PSR_CWP_MASK 0x00000007 /* bits 0 - 4 */ /* This constant is a mask for the ET bits in the PSR. */ #define SPARC_PSR_ET_MASK 0x00000020 /* bit 5 */ /* This constant is a mask for the PS bits in the PSR. */ #define SPARC_PSR_PS_MASK 0x00000040 /* bit 6 */ /* This constant is a mask for the S bits in the PSR. */ #define SPARC_PSR_S_MASK 0x00000080 /* bit 7 */ /* This constant is a mask for the PIL bits in the PSR. */ #define SPARC_PSR_PIL_MASK 0x00000F00 /* bits 8 - 11 */ /* This constant is a mask for the EF bits in the PSR. */ #define SPARC_PSR_EF_MASK 0x00001000 /* bit 12 */ /* This constant is a mask for the EC bits in the PSR. */ #define SPARC_PSR_EC_MASK 0x00002000 /* bit 13 */ /* This constant is a mask for the ICC bits in the PSR. */ #define SPARC_PSR_ICC_MASK 0x00F00000 /* bits 20 - 23 */ /* This constant is a mask for the VER bits in the PSR. */ #define SPARC_PSR_VER_MASK 0x0F000000 /* bits 24 - 27 */ /* This constant is a mask for the IMPL bits in the PSR. */ #define SPARC_PSR_IMPL_MASK 0xF0000000 /* bits 28 - 31 */ /* This constant is the starting bit position of the CWP in the PSR. */ #define SPARC_PSR_CWP_BIT_POSITION 0 /* bits 0 - 4 */ /* This constant is the starting bit position of the ET in the PSR. */ #define SPARC_PSR_ET_BIT_POSITION 5 /* bit 5 */ /* This constant is the starting bit position of the PS in the PSR. */ #define SPARC_PSR_PS_BIT_POSITION 6 /* bit 6 */ /* This constant is the starting bit position of the S in the PSR. */ #define SPARC_PSR_S_BIT_POSITION 7 /* bit 7 */ /* This constant is the starting bit position of the PIL in the PSR. */ #define SPARC_PSR_PIL_BIT_POSITION 8 /* bits 8 - 11 */ /* This constant is the starting bit position of the EF in the PSR. */ #define SPARC_PSR_EF_BIT_POSITION 12 /* bit 12 */ /* This constant is the starting bit position of the EC in the PSR. */ #define SPARC_PSR_EC_BIT_POSITION 13 /* bit 13 */ /* This constant is the starting bit position of the ICC in the PSR. */ #define SPARC_PSR_ICC_BIT_POSITION 20 /* bits 20 - 23 */ /* This constant is the starting bit position of the VER in the PSR. */ #define SPARC_PSR_VER_BIT_POSITION 24 /* bits 24 - 27 */ /* This constant is the starting bit position of the IMPL in the PSR. */ #define SPARC_PSR_IMPL_BIT_POSITION 28 /* bits 28 - 31 */ #define SPARC_NUMBER_OF_REGISTER_WINDOWS 8 #define CPU_STACK_FRAME_L0_OFFSET 0x00 #define CPU_STACK_FRAME_L2_OFFSET 0x08 #define CPU_STACK_FRAME_L4_OFFSET 0x10 #define CPU_STACK_FRAME_L6_OFFSET 0x18 #define CPU_STACK_FRAME_I0_OFFSET 0x20 #define CPU_STACK_FRAME_I2_OFFSET 0x28 #define CPU_STACK_FRAME_I4_OFFSET 0x30 #define CPU_STACK_FRAME_I6_FP_OFFSET 0x38 #define CPU_STRUCTURE_RETURN_ADDRESS_OFFSET 0x40 #define CPU_STACK_FRAME_SAVED_ARG0_OFFSET 0x44 #define CPU_STACK_FRAME_SAVED_ARG1_OFFSET 0x48 #define CPU_STACK_FRAME_SAVED_ARG2_OFFSET 0x4c #define CPU_STACK_FRAME_SAVED_ARG3_OFFSET 0x50 #define CPU_STACK_FRAME_SAVED_ARG4_OFFSET 0x54 #define CPU_STACK_FRAME_SAVED_ARG5_OFFSET 0x58 #define CPU_STACK_FRAME_PAD0_OFFSET 0x5c #define CPU_MINIMUM_STACK_FRAME_SIZE 0x60 #define ISF_STACK_FRAME_OFFSET 0x00 #define ISF_PSR_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x00) #define ISF_PC_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x04) #define ISF_NPC_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x08) #define ISF_G1_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x0c) #define ISF_G2_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x10) #define ISF_G4_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x18) #define ISF_G6_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x20) #define ISF_I0_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x28) #define ISF_I2_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x30) #define ISF_I4_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x38) #define ISF_I6_FP_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x40) #define ISF_Y_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x48) #define ISF_FSR_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x4c) #define ISF_F0_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x50) #define ISF_F2_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x58) #define ISF_F4_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x60) #define ISF_F6_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x68) #define ISF_F8_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x70) #define ISF_F10_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x78) #define ISF_F12_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x80) #define ISF_F14_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x88) #define ISF_F16_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x90) #define ISF_F18_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0x98) #define ISF_F20_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0xa0) #define ISF_F22_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0xa8) #define ISF_F24_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0xb0) #define ISF_F26_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0xb8) #define ISF_F28_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0xc0) #define ISF_F30_OFFSET (CPU_MINIMUM_STACK_FRAME_SIZE + 0xc8) #define CONTEXT_CONTROL_INTERRUPT_FRAME_SIZE (CPU_MINIMUM_STACK_FRAME_SIZE + 0x50 + 32*4) /* Offsets of fields with Context_Control for assembly routines. */ /* This macro defines an offset into the context for use in assembly. */ #define PSR_OFFSET 0x00 /* This macro defines an offset into the context for use in assembly. */ #define PC_OFFSET 0x04 /* This macro defines an offset into the context for use in assembly. */ #define NPC_OFFSET 0x08 /* This macro defines an offset into the context for use in assembly. */ #define G1_OFFSET 0x0C /* This macro defines an offset into the context for use in assembly. */ #define G2_OFFSET 0x10 /* This macro defines an offset into the context for use in assembly. */ #define G3_OFFSET 0x14 /* This macro defines an offset into the context for use in assembly. */ #define G4_OFFSET 0x18 /* This macro defines an offset into the context for use in assembly. */ #define G5_OFFSET 0x1C /* This macro defines an offset into the context for use in assembly. */ #define G6_OFFSET 0x20 /* This macro defines an offset into the context for use in assembly. */ #define G7_OFFSET 0x24 /* This macro defines an offset into the context for use in assembly. */ #define O0_OFFSET 0x28 /* This macro defines an offset into the context for use in assembly. */ #define O1_OFFSET 0x2C /* This macro defines an offset into the context for use in assembly. */ #define O2_OFFSET 0x30 /* This macro defines an offset into the context for use in assembly. */ #define O3_OFFSET 0x34 /* This macro defines an offset into the context for use in assembly. */ #define O4_OFFSET 0x38 /* This macro defines an offset into the context for use in assembly. */ #define O5_OFFSET 0x3C /* This macro defines an offset into the context for use in assembly. */ #define O6_SP_OFFSET 0x40 /* This macro defines an offset into the context for use in assembly. */ #define O7_OFFSET 0x44 #define Y_OFFSET 0x48 #define FSR_OFFSET 0x4c #define F0_OFFSET 0x50 #define F2_OFFSET 0x58 #define F4_OFFSET 0x60 #define F6_OFFSET 0x68 #define F8_OFFSET 0x70 #define F10_OFFSET 0x78 #define F12_OFFSET 0x80 #define F14_OFFSET 0x88 #define F16_OFFSET 0x90 #define F18_OFFSET 0x98 #define F20_OFFSET 0xa0 #define F22_OFFSET 0xa8 #define F24_OFFSET 0xb0 #define F26_OFFSET 0xb8 #define F28_OFFSET 0xc0 #define F30_OFFSET 0xc8 #if ( SPARC_HAS_FPU == 1 ) /* Offset of the CPU_Per_CPU_control::fsr field relative to the * Per_CPU_Control begin. */ #define SPARC_PER_CPU_FSR_OFFSET 4 #endif /**************************************************************************** * Public Types ****************************************************************************/ #ifndef __ASSEMBLY__ /* This structure represents the return state from a system call */ #ifdef CONFIG_BUILD_KERNEL struct xcpt_syscall_s { uint32_t sysreturn; /* The return PC */ }; #endif /* The following structure is included in the TCB and defines the complete * state of the thread. */ struct xcptcontext { /* The following function pointer is non-NULL if there are pending signals * to be processed. */ void *sigdeliver; /* Actual type is sig_deliver_t */ /* These additional register save locations are used to implement the * signal delivery trampoline. * * REVISIT: Because there is only one copy of these save areas, * only a single signal handler can be active. This precludes * queuing of signal actions. As a result, signals received while * another signal handler is executing will be ignored! */ uint32_t saved_pc; /* Trampoline PC */ uint32_t saved_npc; /* Trampoline nPC */ uint32_t saved_status; /* Status with interrupts disabled. */ #ifdef CONFIG_BUILD_KERNEL /* This is the saved address to use when returning from a user-space * signal handler. */ uint32_t sigreturn; #endif #ifdef CONFIG_BUILD_KERNEL /* The following array holds information needed to return from each nested * system call. */ uint8_t nsyscalls; struct xcpt_syscall_s syscall[CONFIG_SYS_NNEST]; #endif /* Register save area */ uint32_t regs[XCPTCONTEXT_REGS] __attribute__((aligned(8))); }; /**************************************************************************** * Inline functions ****************************************************************************/ /* Macro to set the PSR. * This macro sets the PSR register to the value in _psr. */ #define sparc_set_psr( _psr ) \ do { \ __asm__ volatile ( "mov %0, %%psr " : "=r" ((_psr)) : "0" ((_psr)) ); \ nop(); \ nop(); \ nop(); \ } while ( 0 ) /* Macro to obtain the PSR. * This macro returns the current contents of the PSR register in _psr. */ #define sparc_get_psr( _psr ) \ do { \ (_psr) = 0; \ __asm__ volatile( "rd %%psr, %0" : "=r" (_psr) : "0" (_psr) ); \ } while ( 0 ) /* This macro is a standard nop instruction. */ #define nop() \ do { \ __asm__ volatile ( "nop" ); \ } while ( 0 ) /* Macro to obtain the TBR. * This macro returns the current contents of the TBR register in _tbr. */ #define sparc_get_tbr( _tbr ) \ do { \ (_tbr) = 0; /* to avoid unitialized warnings */ \ __asm__ volatile( "rd %%tbr, %0" : "=r" (_tbr) : "0" (_tbr) ); \ } while ( 0 ) /* Macro to set the TBR. * This macro sets the TBR register to the value in _tbr. */ #define sparc_set_tbr( _tbr ) \ do { \ __asm__ volatile( "wr %0, 0, %%tbr" : "=r" (_tbr) : "0" (_tbr) ); \ } while ( 0 ) /* Macro to obtain the WIM. * This macro returns the current contents of the WIM field in _wim. */ #define sparc_get_wim( _wim ) \ do { \ __asm__ volatile( "rd %%wim, %0" : "=r" (_wim) : "0" (_wim) ); \ } while ( 0 ) /* Macro to set the WIM. * This macro sets the WIM field to the value in _wim. */ #define sparc_set_wim( _wim ) \ do { \ __asm__ volatile( "wr %0, %%wim" : "=r" (_wim) : "0" (_wim) ); \ nop(); \ nop(); \ nop(); \ } while ( 0 ) /* Macro to obtain the Y register. * This macro returns the current contents of the Y register in _y. */ #define sparc_get_y( _y ) \ do { \ __asm__ volatile( "rd %%y, %0" : "=r" (_y) : "0" (_y) ); \ } while ( 0 ) /* Macro to set the Y register. * This macro sets the Y register to the value in _y. */ #define sparc_set_y( _y ) \ do { \ __asm__ volatile( "wr %0, %%y" : "=r" (_y) : "0" (_y) ); \ } while ( 0 ) /* Macro to obtain the asr17. * This macro returns the current contents of the asr17 register in _asr17. */ #define sparc_get_asr17( _asr17 ) \ do { \ (_asr17) = 0; /* to avoid unitialized warnings */ \ __asm__ volatile( "rd %%asr17, %0" : "=r" (_asr17) : "0" (_asr17) ); \ } while ( 0 ) /* SPARC disable processor interrupts. * This method is invoked to disable all maskable interrupts. * This method returns the entire PSR contents. */ static inline uint32_t sparc_disable_interrupts(void) { register uint32_t psr __asm__("g1"); /* return value of trap handler */ __asm__ volatile ("ta %1\n\t" : "=r" (psr) : "i" (SPARC_SWTRAP_IRQDIS)); return psr; } /* SPARC enable processor interrupts. * This method is invoked to enable all maskable interrupts. * psr is the PSR returned by sparc_disable_interrupts. */ static inline void sparc_enable_interrupts(uint32_t psr) { register uint32_t _psr __asm__("g1") = psr; /* input to trap handler */ /* The trap instruction has a higher trap priority than the interrupts * according to "The SPARC Architecture Manual: Version 8", Table 7-1 * "Exception and Interrupt Request Priority and tt Values". Add a nop to * prevent a trap instruction right after the interrupt enable trap. */ __asm__ volatile ("ta %0\nnop\n" :: "i" (SPARC_SWTRAP_IRQEN), "r" (_psr)); } /* SPARC flash processor interrupts. * This method is invoked to temporarily enable all maskable interrupts. * _psr is the PSR returned by sparc_disable_interrupts. */ #define sparc_flash_interrupts( _psr ) \ do { \ sparc_enable_interrupts( (_psr) ); \ _psr = sparc_disable_interrupts(); \ } while ( 0 ) /* SPARC obtain interrupt level. * This method is invoked to obtain the current interrupt disable level. * _level is the PSR returned by sparc_disable_interrupts. */ #define sparc_get_interrupt_level( _level ) \ do { \ register uint32_t _psr_level = 0; \ \ sparc_get_psr( _psr_level ); \ (_level) = \ (_psr_level & SPARC_PSR_PIL_MASK) >> SPARC_PSR_PIL_BIT_POSITION; \ } while ( 0 ) /**************************************************************************** * Public Data ****************************************************************************/ /**************************************************************************** * Public Function Prototypes ****************************************************************************/ #ifdef __cplusplus #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /**************************************************************************** * Name: up_irq_save * * Description: * Save the current interrupt state and disable interrupts. * * NOTE: This function should never be called from application code and, * as a general rule unless you really know what you are doing, this * function should not be called directly from operation system code : * Typically, the wrapper functions, enter_critical_section() is probably * what you really want. * * Input Parameters: * None * * Returned Value: * Interrupt state prior to disabling interrupts. * ****************************************************************************/ irqstate_t up_irq_save(void); /**************************************************************************** * Name: up_irq_restore * * Description: * Restore the previous interrupt state (i.e., the one previously returned * by up_irq_save()) * * NOTE: This function should never be called from application code and, * as a general rule unless you really know what you are doing, this * function should not be called directly from operation system code : * Typically, the wrapper functions, leave_critical_section() is probably * what you really want. * * Input Parameters: * state - The interrupt state to be restored. * * Returned Value: * None * ****************************************************************************/ void up_irq_restore(irqstate_t irqtate); /**************************************************************************** * Name: up_irq_enable * * Description: * Enable interrupts * * Input Parameters: * None. * * Returned Value: * None * ****************************************************************************/ void up_irq_enable(void); /**************************************************************************** * Name: up_irq_disable * * Description: * Disable interrupts * * Input Parameters: * None. * * Returned Value: * the entire PSR contents * ****************************************************************************/ uint32_t up_irq_disable(void); #undef EXTERN #ifdef __cplusplus } #endif #endif /* __ASSEMBLY */ #endif /* __ARCH_SPARC_INCLUDE_SPARC_V8_IRQ_H */