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