[PATCH v2] Update motorola_power to irq-generic interrupt management
Joel Sherrill
joel at rtems.org
Sat Feb 13 01:58:38 UTC 2021
On Fri, Feb 12, 2021 at 7:38 PM <chrisj at rtems.org> wrote:
> From: Chris Johns <chrisj at rtems.org>
>
> - Add support to the BSP to enable irq-generic management
>
> - Update the powerpc shared irq code to support irq-generic. This
> is an option in option for existing powerpc bsps. This change
>
Probably just an option. :)
I'm cool with the patch. This code is all over the place formatting
wise and caution is advised.
> should be simpler now
>
> - Fix a number of issues in ISA IRQ controller handling by porting
> fixes from the i386 (PC) BSP
>
> Closes #4238
> Closes #4239
> ---
> bsps/powerpc/include/bsp/irq_supp.h | 5 +
> .../motorola_powerpc/include/bsp/irq.h | 15 +-
> .../powerpc/motorola_powerpc/start/bspstart.c | 7 +-
> bsps/powerpc/shared/irq/i8259.c | 152 ++++++++++++++----
> bsps/powerpc/shared/irq/irq_init.c | 15 +-
> bsps/powerpc/shared/irq/openpic_i8259_irq.c | 27 ++--
> bsps/powerpc/shared/irq/ppc-irq-generic.c | 117 ++++++++++++++
> .../bsps/powerpc/motorola_powerpc/grp.yml | 2 +-
> .../bsps/powerpc/motorola_powerpc/obj.yml | 3 +-
> 9 files changed, 286 insertions(+), 57 deletions(-)
> create mode 100644 bsps/powerpc/shared/irq/ppc-irq-generic.c
>
> diff --git a/bsps/powerpc/include/bsp/irq_supp.h
> b/bsps/powerpc/include/bsp/irq_supp.h
> index 65af48c87f..fbb16d6211 100644
> --- a/bsps/powerpc/include/bsp/irq_supp.h
> +++ b/bsps/powerpc/include/bsp/irq_supp.h
> @@ -50,6 +50,11 @@ extern int BSP_disable_irq_at_pic(const
> rtems_irq_number irqLine);
> */
> extern int BSP_setup_the_pic(rtems_irq_global_settings* config);
>
> +/*
> + * Set up for the irq-generic.h interface.
> + */
> +int BSP_rtems_irq_generic_set(rtems_irq_global_settings* config);
> +
> /* IRQ dispatcher to be defined by the PIC driver; note that it MUST
> * implement shared interrupts.
> * Note also that the exception frame passed to this handler is not very
> diff --git a/bsps/powerpc/motorola_powerpc/include/bsp/irq.h
> b/bsps/powerpc/motorola_powerpc/include/bsp/irq.h
> index 3690dbbff7..cbb6ff69cf 100644
> --- a/bsps/powerpc/motorola_powerpc/include/bsp/irq.h
> +++ b/bsps/powerpc/motorola_powerpc/include/bsp/irq.h
> @@ -19,9 +19,17 @@
> #ifndef BSP_POWERPC_IRQ_H
> #define BSP_POWERPC_IRQ_H
>
> +#ifndef BSP_SHARED_HANDLER_SUPPORT
> #define BSP_SHARED_HANDLER_SUPPORT 1
> +#endif
> +
> #include <rtems/irq.h>
> -#include <bsp/irq-default.h>
> +
> +/*
> + * Switch to using the generic support. Remove this when all BSPs have
> + * been converted.
> + */
> +#define BSP_POWERPC_IRQ_GENERIC_SUPPORT 1
>
> /*
> * 8259 edge/level control definitions at VIA
> @@ -107,6 +115,8 @@ extern "C" {
> #define BSP_IRQ_NUMBER (BSP_MISC_IRQ_MAX_OFFSET + 1)
> #define BSP_LOWEST_OFFSET (BSP_ISA_IRQ_LOWEST_OFFSET)
> #define BSP_MAX_OFFSET (BSP_MISC_IRQ_MAX_OFFSET)
> +#define BSP_INTERRUPT_VECTOR_MIN (BSP_LOWEST_OFFSET)
> +#define BSP_INTERRUPT_VECTOR_MAX (BSP_MAX_OFFSET)
> /*
> * Some ISA IRQ symbolic name definition
> */
> @@ -191,6 +201,9 @@ int BSP_irq_ack_at_i8259s (const
> rtems_irq_number irqLine);
> */
> int BSP_irq_enabled_at_i8259s (const rtems_irq_number irqLine);
>
> +unsigned short BSP_irq_suspend_i8259s(unsigned short mask);
> +void BSP_irq_resume_i8259s(unsigned short in_progress_save);
> +
> extern void BSP_rtems_irq_mng_init(unsigned cpuId);
> extern void BSP_i8259s_init(void);
>
> diff --git a/bsps/powerpc/motorola_powerpc/start/bspstart.c
> b/bsps/powerpc/motorola_powerpc/start/bspstart.c
> index e74b02c446..ef8418e2c6 100644
> --- a/bsps/powerpc/motorola_powerpc/start/bspstart.c
> +++ b/bsps/powerpc/motorola_powerpc/start/bspstart.c
> @@ -27,6 +27,7 @@
> #include <bsp/pci.h>
> #include <bsp/openpic.h>
> #include <bsp/irq.h>
> +#include <bsp/irq-generic.h>
> #include <libcpu/bat.h>
> #include <libcpu/pte121.h>
> #include <libcpu/cpuIdent.h>
> @@ -334,10 +335,8 @@ static void bsp_early( void )
> */
> bsp_clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor *
> 1000);
>
> - /*
> - * Initalize RTEMS IRQ system
> - */
> - BSP_rtems_irq_mng_init(0);
> + /* Initialize interrupt support */
> + bsp_interrupt_initialize();
>
> /* Activate the page table mappings only after
> * initializing interrupts because the irq_mng_init()
> diff --git a/bsps/powerpc/shared/irq/i8259.c
> b/bsps/powerpc/shared/irq/i8259.c
> index 7363e87ba0..6a80e24946 100644
> --- a/bsps/powerpc/shared/irq/i8259.c
> +++ b/bsps/powerpc/shared/irq/i8259.c
> @@ -12,6 +12,19 @@
> #include <bsp.h>
> #include <bsp/irq.h>
>
> +#define PIC_EOSI 0x60 ///< End of Specific Interrupt (EOSI)
> +#define PIC_EOI 0x20 ///< Generic End of Interrupt (EOI)
> +
> +/* Operation control word type 3. Bit 3 (0x08) must be set. Even
> address. */
> +#define PIC_OCW3_RIS 0x01 /* 1 = read IS, 0 = read IR */
> +#define PIC_OCW3_RR 0x02 /* register read */
> +#define PIC_OCW3_P 0x04 /* poll mode command */
> +/* 0x08 must be 1 to select OCW3 vs OCW2 */
> +#define PIC_OCW3_SEL 0x08 /* must be 1 */
> +/* 0x10 must be 0 to select OCW3 vs ICW1 */
> +#define PIC_OCW3_SMM 0x20 /* special mode mask */
> +#define PIC_OCW3_ESMM 0x40 /* enable SMM */
> +
>
> /*-------------------------------------------------------------------------+
> | Cache for 1st and 2nd PIC IRQ line's status (enabled or disabled)
> register.
>
> +--------------------------------------------------------------------------*/
> @@ -19,91 +32,137 @@
> * lower byte is interrupt mask on the master PIC.
> * while upper bits are interrupt on the slave PIC.
> */
> -volatile rtems_i8259_masks i8259s_cache = 0xfffb;
> +static rtems_i8259_masks i8259s_imr_cache = 0xFFFB;
> +static rtems_i8259_masks i8259s_in_progress = 0;
> +
> +static inline
> +void BSP_i8259s_irq_update_master_imr( void )
> +{
> + rtems_i8259_masks mask = i8259s_in_progress | i8259s_imr_cache;
> + outport_byte( PIC_MASTER_IMR_IO_PORT, mask & 0xff );
> +}
> +
> +static inline
> +void BSP_i8259s_irq_update_slave_imr( void )
> +{
> + rtems_i8259_masks mask = i8259s_in_progress | i8259s_imr_cache;
> + outport_byte( PIC_SLAVE_IMR_IO_PORT, ( mask >> 8 ) & 0xff );
> +}
> +
> +/*
> + * Is the IRQ valid?
> + */
> +static inline bool BSP_i8259s_irq_valid(const rtems_irq_number irqLine)
> +{
> + return ((int)irqLine >= BSP_ISA_IRQ_LOWEST_OFFSET) &&
> + ((int)irqLine <= BSP_ISA_IRQ_MAX_OFFSET);
> +}
> +
> +/*
> + * Read the IRR register. The default.
> + */
> +static inline uint8_t BSP_i8259s_irq_int_request_reg(uint32_t ioport)
> +{
> + uint8_t isr;
> + inport_byte(ioport, isr);
> + return isr;
> +}
> +
> +/*
> + * Read the ISR register. Keep the default of the IRR.
> + */
> +static inline uint8_t BSP_i8259s_irq_in_service_reg(uint32_t ioport)
> +{
> + uint8_t isr;
> + outport_byte(ioport, PIC_OCW3_SEL | PIC_OCW3_RR | PIC_OCW3_RIS);
> + inport_byte(ioport, isr);
> + outport_byte(ioport, PIC_OCW3_SEL | PIC_OCW3_RR);
> + return isr;
> +}
>
>
> /*-------------------------------------------------------------------------+
> | Function: BSP_irq_disable_at_i8259s
> | Description: Mask IRQ line in appropriate PIC chip.
> -| Global Variables: i8259s_cache
> +| Global Variables: i8259s_imr_cache, i8259s_in_progress
> | Arguments: vector_offset - number of IRQ line to mask.
> -| Returns: original state or -1 on error.
> +| Returns: 0 is OK.
>
> +--------------------------------------------------------------------------*/
> -int BSP_irq_disable_at_i8259s (const rtems_irq_number irqLine)
> +int BSP_irq_disable_at_i8259s(const rtems_irq_number irqLine)
> {
> unsigned short mask;
> rtems_interrupt_level level;
> - int rval;
>
> - if ( ((int)irqLine < BSP_ISA_IRQ_LOWEST_OFFSET) ||
> - ((int)irqLine > BSP_ISA_IRQ_MAX_OFFSET)
> - )
> + if (!BSP_i8259s_irq_valid(irqLine))
> return -1;
>
> rtems_interrupt_disable(level);
>
> mask = 1 << irqLine;
> - rval = i8259s_cache & mask ? 0 : 1;
> - i8259s_cache |= mask;
> + i8259s_imr_cache |= mask;
>
> if (irqLine < 8)
> {
> - outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
> + BSP_i8259s_irq_update_master_imr();
> }
> else
> {
> - outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
> + BSP_i8259s_irq_update_slave_imr();
> }
> +
> rtems_interrupt_enable(level);
>
> - return rval;
> + return 0;
> }
>
>
> /*-------------------------------------------------------------------------+
> | Function: BSP_irq_enable_at_i8259s
> | Description: Unmask IRQ line in appropriate PIC chip.
> -| Global Variables: i8259s_cache
> +| Global Variables: i8259s_imr_cache, i8259s_in_progress
> | Arguments: irqLine - number of IRQ line to mask.
> | Returns: Nothing.
>
> +--------------------------------------------------------------------------*/
> -int BSP_irq_enable_at_i8259s (const rtems_irq_number irqLine)
> +int BSP_irq_enable_at_i8259s(const rtems_irq_number irqLine)
> {
> - unsigned short mask;
> rtems_interrupt_level level;
> + unsigned short mask;
> + uint8_t isr;
> + uint8_t irr;
>
> - if ( ((int)irqLine < BSP_ISA_IRQ_LOWEST_OFFSET) ||
> - ((int)irqLine > BSP_ISA_IRQ_MAX_OFFSET )
> - )
> + if (!BSP_i8259s_irq_valid(irqLine))
> return 1;
>
> rtems_interrupt_disable(level);
>
> - mask = ~(1 << irqLine);
> - i8259s_cache &= mask;
> + mask = 1 << irqLine;
> + i8259s_imr_cache &= ~mask;
>
> if (irqLine < 8)
> {
> - outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
> + isr = BSP_i8259s_irq_in_service_reg(PIC_MASTER_COMMAND_IO_PORT);
> + irr = BSP_i8259s_irq_int_request_reg(PIC_MASTER_COMMAND_IO_PORT);
> + BSP_i8259s_irq_update_master_imr();
> }
> else
> {
> - outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
> + isr = BSP_i8259s_irq_in_service_reg(PIC_SLAVE_COMMAND_IO_PORT);
> + irr = BSP_i8259s_irq_int_request_reg(PIC_SLAVE_COMMAND_IO_PORT);
> + BSP_i8259s_irq_update_slave_imr();
> }
> +
> rtems_interrupt_enable(level);
>
> return 0;
> } /* mask_irq */
>
> -int BSP_irq_enabled_at_i8259s (const rtems_irq_number irqLine)
> +int BSP_irq_enabled_at_i8259s(const rtems_irq_number irqLine)
> {
> unsigned short mask;
>
> - if ( ((int)irqLine < BSP_ISA_IRQ_LOWEST_OFFSET) ||
> - ((int)irqLine > BSP_ISA_IRQ_MAX_OFFSET)
> - )
> + if (!BSP_i8259s_irq_valid(irqLine))
> return 1;
>
> mask = (1 << irqLine);
> - return (~(i8259s_cache & mask));
> + return (~(i8259s_imr_cache & mask));
> }
>
>
> /*-------------------------------------------------------------------------+
> @@ -113,24 +172,47 @@ int BSP_irq_enabled_at_i8259s (const
> rtems_irq_number irqLine)
> | Arguments: irqLine - number of IRQ line to acknowledge.
> | Returns: Nothing.
>
> +--------------------------------------------------------------------------*/
> -int BSP_irq_ack_at_i8259s (const rtems_irq_number irqLine)
> +int BSP_irq_ack_at_i8259s(const rtems_irq_number irqLine)
> {
> + uint8_t slave_isr = 0;
> +
> if (irqLine >= 8) {
> - outport_byte(PIC_MASTER_COMMAND_IO_PORT, SLAVE_PIC_EOSI);
> - outport_byte(PIC_SLAVE_COMMAND_IO_PORT, (PIC_EOSI | (irqLine - 8)));
> - }
> - else {
> - outport_byte(PIC_MASTER_COMMAND_IO_PORT, (PIC_EOSI | irqLine));
> + outport_byte(PIC_SLAVE_COMMAND_IO_PORT, PIC_EOI);
> + slave_isr = BSP_i8259s_irq_in_service_reg(PIC_SLAVE_COMMAND_IO_PORT);
> }
>
> + /*
> + * Only issue the EOI to the master if there are no more interrupts in
> + * service for the slave. i8259a data sheet page 18, The Special Fully
> Nested
> + * Mode, b.
> + */
> + if (slave_isr == 0)
> + outport_byte(PIC_MASTER_COMMAND_IO_PORT, PIC_EOI);
> +
> return 0;
>
> } /* ackIRQ */
>
> +unsigned short BSP_irq_suspend_i8259s(unsigned short mask)
> +{
> + unsigned short in_progress_save = i8259s_in_progress;
> + i8259s_in_progress |= mask;
> + BSP_i8259s_irq_update_master_imr();
> + BSP_i8259s_irq_update_slave_imr();
> + return in_progress_save;
> +}
> +
> +void BSP_irq_resume_i8259s(unsigned short in_progress_save)
> +{
> + i8259s_in_progress = in_progress_save;
> + BSP_i8259s_irq_update_master_imr();
> + BSP_i8259s_irq_update_slave_imr();
> +}
> +
> void BSP_i8259s_init(void)
> {
> /*
> - * init master 8259 interrupt controller
> + * Always mask at least current interrupt to prevent re-entrance
> */
> outport_byte(PIC_MASTER_COMMAND_IO_PORT, 0x11); /* Start init sequence
> */
> outport_byte(PIC_MASTER_IMR_IO_PORT, 0x00);/* Vector base = 0 */
> diff --git a/bsps/powerpc/shared/irq/irq_init.c
> b/bsps/powerpc/shared/irq/irq_init.c
> index 1042c9d1a8..233c659b85 100644
> --- a/bsps/powerpc/shared/irq/irq_init.c
> +++ b/bsps/powerpc/shared/irq/irq_init.c
> @@ -280,6 +280,7 @@ void BSP_rtems_irq_mng_init(unsigned cpuId)
> int known_cpi_isa_bridge = 0;
> #endif
> int i;
> + int r;
>
> /*
> * First initialize the Interrupt management hardware
> @@ -351,7 +352,19 @@ void BSP_rtems_irq_mng_init(unsigned cpuId)
> initial_config.irqBase = BSP_LOWEST_OFFSET;
> initial_config.irqPrioTbl = irqPrioTable;
>
> - if (!BSP_rtems_irq_mngt_set(&initial_config)) {
> +#ifdef BSP_POWERPC_IRQ_GENERIC_SUPPORT
> +#ifdef TRACE_IRQ_INIT
> + printk("RTEMS IRQ management: irq-generic\n");
> +#endif
> + r = BSP_rtems_irq_generic_set(&initial_config);
> +#else
> +#ifdef TRACE_IRQ_INIT
> + printk("RTEMS IRQ management: legacy\n");
> +#endif
> + r = BSP_rtems_irq_mngt_set(&initial_config);
> +#endif
> +
> + if (!r) {
> /*
> * put something here that will show the failure...
> */
> diff --git a/bsps/powerpc/shared/irq/openpic_i8259_irq.c
> b/bsps/powerpc/shared/irq/openpic_i8259_irq.c
> index 513b9ac3e0..2617555658 100644
> --- a/bsps/powerpc/shared/irq/openpic_i8259_irq.c
> +++ b/bsps/powerpc/shared/irq/openpic_i8259_irq.c
> @@ -15,6 +15,7 @@
> #include <bsp.h>
> #include <bsp/irq.h>
> #include <bsp/irq_supp.h>
> +#include <bsp/irq-generic.h>
> #ifndef BSP_HAS_NO_VME
> #include <bsp/VMEConfig.h>
> #endif
> @@ -234,15 +235,15 @@ int C_dispatch_irq_handler (BSP_Exception_frame
> *frame, unsigned int excNum)
> #if BSP_ISA_IRQ_NUMBER > 0
> register unsigned isaIntr; /* boolean */
> register unsigned oldMask = 0; /* old isa pic masks */
> - register unsigned newMask; /* new isa pic masks */
> #endif
>
> if (excNum == ASM_DEC_VECTOR) {
> -
> - bsp_irq_dispatch_list(rtems_hdl_tbl, BSP_DECREMENTER,
> default_rtems_entry.hdl);
> -
> +#ifdef BSP_POWERPC_IRQ_GENERIC_SUPPORT
> + bsp_interrupt_handler_dispatch(BSP_DECREMENTER);
> +#else
> + bsp_irq_dispatch_list(rtems_hdl_tbl, BSP_DECREMENTER,
> default_rtems_entry.hdl);
> +#endif
> return 0;
> -
> }
>
> #if BSP_PCI_IRQ_NUMBER > 0
> @@ -274,7 +275,7 @@ int C_dispatch_irq_handler (BSP_Exception_frame
> *frame, unsigned int excNum)
>
> #if BSP_ISA_IRQ_NUMBER > 0
> #ifdef BSP_PCI_ISA_BRIDGE_IRQ
> -#if 0 == BSP_PCI_IRQ_NUMBER
> +#if 0 == BSP_PCI_IRQ_NUMBER
> #error "Configuration Error -- BSP w/o PCI IRQs MUST NOT define
> BSP_PCI_ISA_BRIDGE_IRQ"
> #endif
> isaIntr = (irq == BSP_PCI_ISA_BRIDGE_IRQ);
> @@ -289,11 +290,7 @@ int C_dispatch_irq_handler (BSP_Exception_frame
> *frame, unsigned int excNum)
> /*
> * store current PIC mask
> */
> - oldMask = i8259s_cache;
> - newMask = oldMask | irq_mask_or_tbl [irq];
> - i8259s_cache = newMask;
> - outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
> - outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
> + oldMask = BSP_irq_suspend_i8259s(irq_mask_or_tbl [irq]);
> BSP_irq_ack_at_i8259s (irq);
> #if BSP_PCI_IRQ_NUMBER > 0
> if ( OpenPIC )
> @@ -303,13 +300,15 @@ int C_dispatch_irq_handler (BSP_Exception_frame
> *frame, unsigned int excNum)
> #endif
>
> /* dispatch handlers */
> +#ifdef BSP_POWERPC_IRQ_GENERIC_SUPPORT
> + bsp_interrupt_handler_dispatch(irq);
> +#else
> bsp_irq_dispatch_list(rtems_hdl_tbl, irq, default_rtems_entry.hdl);
> +#endif
>
> #if BSP_ISA_IRQ_NUMBER > 0
> if (isaIntr) {
> - i8259s_cache = oldMask;
> - outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
> - outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
> + BSP_irq_resume_i8259s(oldMask);
> }
> else
> #endif
> diff --git a/bsps/powerpc/shared/irq/ppc-irq-generic.c
> b/bsps/powerpc/shared/irq/ppc-irq-generic.c
> new file mode 100644
> index 0000000000..8a70109e52
> --- /dev/null
> +++ b/bsps/powerpc/shared/irq/ppc-irq-generic.c
> @@ -0,0 +1,117 @@
> +/* SPDX-License-Identifier: BSD-2-Clause */
> +
> +/**
> + * @file
> + *
> + * @ingroup RTEMSBSPsPowerPC
> + *
> + * @brief Generic Interrupt suppoer
> + */
> +
> +/*
> + * Copyright (C) 2021 Chris Johns. All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * 2. Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in the
> + * documentation and/or other materials provided with the distribution.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> "AS IS"
> + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
> THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
> PURPOSE
> + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
> BE
> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
> BUSINESS
> + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
> THE
> + * POSSIBILITY OF SUCH DAMAGE.
> + */
> +
> +#include <stdlib.h>
> +
> +#include <rtems.h>
> +#include <stdlib.h>
> +#include <rtems/bspIo.h> /* for printk */
> +#include <libcpu/spr.h>
> +#include <bsp/irq_supp.h>
> +#include <bsp/irq-generic.h>
> +#include <bsp/vectors.h>
> +
> +SPR_RW(BOOKE_TSR)
> +SPR_RW(PPC405_TSR)
> +
> +/* legacy mode for bookE DEC exception;
> + * to avoid the double layer of function calls
> + * (dec_handler_bookE -> C_dispatch_irq_handler -> user handler)
> + * it is preferrable for the user to hook the DEC
> + * exception directly.
> + * However, the legacy mode works with less modifications
> + * of user code.
> + */
> +static int C_dispatch_dec_handler_bookE (BSP_Exception_frame *frame,
> unsigned int excNum)
> +{
> + /* clear interrupt; we must do this
> + * before C_dispatch_irq_handler()
> + * re-enables MSR_EE.
> + * Note that PPC405 uses a different SPR# for TSR
> + */
> + if (ppc_cpu_is_bookE()==PPC_BOOKE_405)
> + _write_PPC405_TSR( BOOKE_TSR_DIS );
> + else
> + _write_BOOKE_TSR( BOOKE_TSR_DIS );
> + return C_dispatch_irq_handler(frame, ASM_DEC_VECTOR);
> +}
> +
> +/*
> + * RTEMS Global Interrupt Handler Management Routines
> + */
> +int BSP_rtems_irq_generic_set(rtems_irq_global_settings* config)
> +{
> + int r;
> +
> + r = BSP_setup_the_pic(config);
> + if (!r)
> + return r;
> +
> + ppc_exc_set_handler(ASM_EXT_VECTOR, C_dispatch_irq_handler);
> + if ( ppc_cpu_is_bookE() ) {
> + /* bookE decrementer interrupt needs to be cleared BEFORE
> + * dispatching the user ISR (because the user ISR is called
> + * with EE enabled)
> + * We do this so that existing DEC handlers can be used
> + * with minor modifications.
> + */
> + ppc_exc_set_handler(ASM_BOOKE_DEC_VECTOR,
> C_dispatch_dec_handler_bookE);
> + } else {
> + ppc_exc_set_handler(ASM_DEC_VECTOR, C_dispatch_irq_handler);
> + }
> +
> + return 1;
> +}
> +
> +void bsp_interrupt_vector_enable(rtems_vector_number vector)
> +{
> + bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
> + BSP_enable_irq_at_pic(vector);
> +}
> +
> +void bsp_interrupt_vector_disable(rtems_vector_number vector)
> +{
> + bsp_interrupt_assert(bsp_interrupt_is_valid_vector(vector));
> + BSP_disable_irq_at_pic(vector);
> +}
> +
> +rtems_status_code bsp_interrupt_facility_initialize(void)
> +{
> + /*
> + * Initialize RTEMS IRQ system
> + */
> + BSP_rtems_irq_mng_init(0);
> + return RTEMS_SUCCESSFUL;
> +}
> diff --git a/spec/build/bsps/powerpc/motorola_powerpc/grp.yml
> b/spec/build/bsps/powerpc/motorola_powerpc/grp.yml
> index f256fec10f..a3ad2b115d 100644
> --- a/spec/build/bsps/powerpc/motorola_powerpc/grp.yml
> +++ b/spec/build/bsps/powerpc/motorola_powerpc/grp.yml
> @@ -10,7 +10,7 @@ links:
> - role: build-dependency
> uid: ../../obj
> - role: build-dependency
> - uid: ../../objirqdflt
> + uid: ../../objirq
> - role: build-dependency
> uid: ../crti
> - role: build-dependency
> diff --git a/spec/build/bsps/powerpc/motorola_powerpc/obj.yml
> b/spec/build/bsps/powerpc/motorola_powerpc/obj.yml
> index 07ee6fa721..ae7b9f96e2 100644
> --- a/spec/build/bsps/powerpc/motorola_powerpc/obj.yml
> +++ b/spec/build/bsps/powerpc/motorola_powerpc/obj.yml
> @@ -39,7 +39,7 @@ source:
> - bsps/powerpc/shared/irq/irq_init.c
> - bsps/powerpc/shared/irq/openpic.c
> - bsps/powerpc/shared/irq/openpic_i8259_irq.c
> -- bsps/powerpc/shared/irq/ppc-irq-legacy.c
> +- bsps/powerpc/shared/irq/ppc-irq-generic.c
> - bsps/powerpc/shared/mmu/bat.c
> - bsps/powerpc/shared/mmu/mmuAsm.S
> - bsps/powerpc/shared/mmu/pte121.c
> @@ -57,5 +57,6 @@ source:
> - bsps/powerpc/shared/start/zerobss.c
> - bsps/shared/dev/getentropy/getentropy-cpucounter.c
> - bsps/shared/dev/rtc/rtc-support.c
> +- bsps/shared/irq/irq-default-handler.c
> - bsps/shared/start/bspfatal-default.c
> type: build
> --
> 2.24.1
>
> _______________________________________________
> devel mailing list
> devel at rtems.org
> http://lists.rtems.org/mailman/listinfo/devel
>
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