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skrzyp |
#ifndef CYGONCE_HAL_SMP_H
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#define CYGONCE_HAL_SMP_H
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//=============================================================================
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//
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// hal_smp.h
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//
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// SMP support
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//
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//=============================================================================
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// ####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later
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// version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with eCos; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// As a special exception, if other files instantiate templates or use
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// macros or inline functions from this file, or you compile this file
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// and link it with other works to produce a work based on this file,
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// this file does not by itself cause the resulting work to be covered by
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// the GNU General Public License. However the source code for this file
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// must still be made available in accordance with section (3) of the GNU
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// General Public License v2.
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//
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// This exception does not invalidate any other reasons why a work based
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// on this file might be covered by the GNU General Public License.
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// -------------------------------------------
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// ####ECOSGPLCOPYRIGHTEND####
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//=============================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): nickg
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// Contributors: nickg
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// Date: 2001-08-03
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// Purpose: Define SMP support abstractions
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// Usage: #include <cyg/hal/hal_smp.h>
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//
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//####DESCRIPTIONEND####
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//
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//=============================================================================
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#include <pkgconf/hal.h>
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#ifdef CYGPKG_HAL_SMP_SUPPORT
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#include <cyg/infra/cyg_type.h>
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#include <cyg/hal/hal_arch.h>
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//=============================================================================
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/*------------------------------------------------------------------------*/
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// APIC definitions
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#define HAL_APIC_ID 0x0020
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#define HAL_APIC_VER 0x0030
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#define HAL_APIC_TPR 0x0080
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#define HAL_APIC_EOI 0x00b0
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#define HAL_APIC_LDR 0x00d0
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#define HAL_APIC_DFR 0x00e0
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#define HAL_APIC_SPIV 0x00f0
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#define HAL_APIC_ISR 0x0100
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#define HAL_APIC_TMR 0x0180
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#define HAL_APIC_IRR 0x0200
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#define HAL_APIC_ICR_LO 0x0300
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#define HAL_APIC_ICR_HI 0x0310
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#define HAL_APIC_LVT_TIMER 0x0320
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#define HAL_APIC_LVT_PC 0x0340
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#define HAL_APIC_LVT_INT0 0x0350
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#define HAL_APIC_LVT_INT1 0x0360
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#define HAL_APIC_LVT_ERROR 0x0370
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#define HAL_APIC_LVT_MASK 0x00010000
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/*------------------------------------------------------------------------*/
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// APIC access macros
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#define HAL_APIC_READ( __addr, __val ) \
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{ \
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HAL_READMEM_UINT32(cyg_hal_smp_local_apic+(__addr), __val ); \
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}
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#define HAL_APIC_WRITE( __addr, __val ) \
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{ \
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HAL_WRITEMEM_UINT32(cyg_hal_smp_local_apic+(__addr), __val ); \
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}
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/*------------------------------------------------------------------------*/
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// I/O APIC definitions
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#define HAL_IOAPIC_REGSEL 0x0000
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#define HAL_IOAPIC_REGWIN 0x0010
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#define HAL_IOAPIC_REG_APICID 0x0000
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#define HAL_IOAPIC_REG_APICVER 0x0001
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#define HAL_IOAPIC_REG_APICARB 0x0002
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#define HAL_IOAPIC_REG_REDTBL 0x0010
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#define HAL_IOAPIC_REG_REDIR_LO(n) (HAL_IOAPIC_REG_REDTBL+((n)*2))
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#define HAL_IOAPIC_REG_REDIR_HI(n) (HAL_IOAPIC_REG_REDTBL+((n)*2)+1)
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/*------------------------------------------------------------------------*/
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// I/O APIC access macros
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#define HAL_IOAPIC_READ( __reg, __val ) \
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{ \
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HAL_WRITEMEM_UINT32( cyg_hal_smp_io_apic+HAL_IOAPIC_REGSEL, __reg ); \
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HAL_READMEM_UINT32( cyg_hal_smp_io_apic+HAL_IOAPIC_REGWIN, __val ); \
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}
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#define HAL_IOAPIC_WRITE( __reg, __val ) \
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{ \
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HAL_WRITEMEM_UINT32( cyg_hal_smp_io_apic+HAL_IOAPIC_REGSEL, __reg ); \
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HAL_WRITEMEM_UINT32( cyg_hal_smp_io_apic+HAL_IOAPIC_REGWIN, __val ); \
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}
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//-----------------------------------------------------------------------------
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// SMP configuration determined from platform during initialization
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__externC CYG_ADDRESS cyg_hal_smp_local_apic;
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__externC CYG_ADDRESS cyg_hal_smp_io_apic;
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__externC CYG_WORD32 cyg_hal_smp_cpu_count;
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__externC CYG_BYTE cyg_hal_smp_cpu_flags[CYGPKG_HAL_SMP_CPU_MAX];
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__externC CYG_BYTE cyg_hal_isa_bus_id;
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__externC CYG_BYTE cyg_hal_isa_bus_irq[16];
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__externC CYG_BYTE cyg_hal_pci_bus_id;
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__externC CYG_BYTE cyg_hal_pci_bus_irq[4];
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//-----------------------------------------------------------------------------
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// CPU numbering macros
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#define HAL_SMP_CPU_TYPE cyg_uint32
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#define HAL_SMP_CPU_MAX CYGPKG_HAL_SMP_CPU_MAX
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#define HAL_SMP_CPU_COUNT() cyg_hal_smp_cpu_count
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#define HAL_SMP_CPU_THIS() \
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({ \
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HAL_SMP_CPU_TYPE __id; \
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HAL_APIC_READ( HAL_APIC_ID, __id ); \
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(__id>>24)&0xF; \
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})
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#define HAL_SMP_CPU_NONE (CYGPKG_HAL_SMP_CPU_MAX+1)
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//-----------------------------------------------------------------------------
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// CPU startup
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__externC void cyg_hal_cpu_release(HAL_SMP_CPU_TYPE cpu);
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#define HAL_SMP_CPU_START( __cpu ) cyg_hal_cpu_release( __cpu );
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#define HAL_SMP_CPU_RESCHEDULE_INTERRUPT( __cpu, __wait ) \
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cyg_hal_cpu_message( __cpu, HAL_SMP_MESSAGE_RESCHEDULE, 0, __wait);
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#define HAL_SMP_CPU_TIMESLICE_INTERRUPT( __cpu, __wait ) \
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cyg_hal_cpu_message( __cpu, HAL_SMP_MESSAGE_TIMESLICE, 0, __wait);
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//-----------------------------------------------------------------------------
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// CPU message exchange
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__externC void cyg_hal_cpu_message( HAL_SMP_CPU_TYPE cpu,
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CYG_WORD32 msg,
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CYG_WORD32 arg,
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CYG_WORD32 wait);
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#define HAL_SMP_MESSAGE_TYPE 0xF0000000
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#define HAL_SMP_MESSAGE_ARG (~HAL_SMP_MESSAGE_TYPE)
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#define HAL_SMP_MESSAGE_RESCHEDULE 0x10000000
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#define HAL_SMP_MESSAGE_MASK 0x20000000
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#define HAL_SMP_MESSAGE_UNMASK 0x30000000
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#define HAL_SMP_MESSAGE_REVECTOR 0x40000000
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#define HAL_SMP_MESSAGE_TIMESLICE 0x50000000
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//-----------------------------------------------------------------------------
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// Test-and-set support
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// These macros provide test-and-set support for the least significant bit
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// in a word.
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#define HAL_TAS_TYPE volatile CYG_WORD32
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#define HAL_TAS_SET( _tas_, _oldb_ ) \
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CYG_MACRO_START \
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{ \
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register CYG_WORD32 __old; \
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__asm__ volatile ( \
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"lock btsl $0,%1\n" \
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"sbbl %0,%0\n" \
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: "=r" (__old), "=m" (_tas_) \
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: \
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: "memory" \
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); \
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_oldb_ = ( __old & 1 ) != 0; \
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} \
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CYG_MACRO_END
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#define HAL_TAS_CLEAR( _tas_, _oldb_ ) \
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CYG_MACRO_START \
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{ \
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register CYG_WORD32 __old; \
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__asm__ volatile ( \
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"lock btrl $0,%1\n" \
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"sbbl %0,%0\n" \
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: "=r" (__old), "=m" (_tas_) \
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: \
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: "memory" \
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); \
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_oldb_ = ( __old & 1 ) != 0; \
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} \
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CYG_MACRO_END
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//-----------------------------------------------------------------------------
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// Spinlock support.
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// Built on top of test-and-set code.
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#define HAL_SPINLOCK_TYPE volatile CYG_WORD32
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#define HAL_SPINLOCK_INIT_CLEAR 0
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#define HAL_SPINLOCK_INIT_SET 1
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#define HAL_SPINLOCK_SPIN( _lock_ ) \
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CYG_MACRO_START \
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{ \
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cyg_bool _val_; \
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do \
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{ \
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HAL_TAS_SET( _lock_, _val_ ); \
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} while( _val_ ); \
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} \
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CYG_MACRO_END
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#define HAL_SPINLOCK_CLEAR( _lock_ ) \
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CYG_MACRO_START \
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{ \
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cyg_bool _val_; \
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HAL_TAS_CLEAR( _lock_ , _val_ ); \
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} \
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CYG_MACRO_END
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#define HAL_SPINLOCK_TRY( _lock_, _val_ ) \
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HAL_TAS_SET( _lock_, _val_ ); \
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(_val_) = (((_val_) & 1) == 0)
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#define HAL_SPINLOCK_TEST( _lock_, _val_ ) \
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(_val_) = (((_lock_) & 1) != 0)
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//-----------------------------------------------------------------------------
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// Diagnostic output serialization
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__externC HAL_SPINLOCK_TYPE cyg_hal_smp_diag_lock;
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#define CYG_HAL_DIAG_LOCK_DATA_DEFN \
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HAL_SPINLOCK_TYPE cyg_hal_smp_diag_lock = HAL_SPINLOCK_INIT_CLEAR
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#define CYG_HAL_DIAG_LOCK() HAL_SPINLOCK_SPIN( cyg_hal_smp_diag_lock )
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#define CYG_HAL_DIAG_UNLOCK() HAL_SPINLOCK_CLEAR( cyg_hal_smp_diag_lock )
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//-----------------------------------------------------------------------------
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// Some extra definitions
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__externC HAL_SPINLOCK_TYPE cyg_hal_ioapic_lock;
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//-----------------------------------------------------------------------------
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#endif // CYGPKG_HAL_SMP_SUPPORT
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//-----------------------------------------------------------------------------
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#endif // CYGONCE_HAL_SMP_H
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// End of hal_smp.h
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