x86, galileo: Add driver for Isolated Memory Regions (IMRs)
The Intel Quark X1000 SoC includes support for Isolated Memory Regions (IMRs), which are specified using range registers and associated control registers that are accessible via the message bus. This patch adds a driver for accessing those registers.
This commit is contained in:
Michael LeMay
parent
25c07613c2
commit
58a00b7c23
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@ -3,7 +3,7 @@ include $(CONTIKI)/cpu/x86/Makefile.x86_common
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CONTIKI_CPU_DIRS += drivers/legacy_pc drivers/quarkX1000 init/legacy_pc
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CONTIKI_SOURCEFILES += bootstrap_quarkX1000.S rtc.c pit.c pic.c irq.c nmi.c pci.c uart-16x50.c uart.c gpio.c i2c.c eth.c shared-isr.c
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CONTIKI_SOURCEFILES += msg-bus.c
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CONTIKI_SOURCEFILES += imr.c msg-bus.c
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CFLAGS += -m32 -march=i586 -mtune=i586
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LDFLAGS += -m32 -Xlinker -T -Xlinker $(CONTIKI)/cpu/x86/quarkX1000.ld
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89
cpu/x86/drivers/quarkX1000/imr.c
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89
cpu/x86/drivers/quarkX1000/imr.c
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@ -0,0 +1,89 @@
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/*
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* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <assert.h>
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#include "imr.h"
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#include "msg-bus.h"
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#define MEM_MANAGER_PORT 5
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#define IMR_BASE_OFFSET 0x40
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#define IMR_REG_COUNT 4
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#define IMR_LO_OFFSET 0
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#define IMR_HI_OFFSET 1
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#define IMR_RDMSK_OFFSET 2
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#define IMR_WRMSK_OFFSET 3
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Read the contents of the specified IMR.
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*/
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quarkX1000_imr_t
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quarkX1000_imr_read(uint32_t imr_idx)
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{
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quarkX1000_imr_t imr;
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uint32_t reg_base = IMR_BASE_OFFSET + (IMR_REG_COUNT * imr_idx);
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assert(imr_idx < QUARKX1000_IMR_CNT);
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quarkX1000_msg_bus_read(MEM_MANAGER_PORT,
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reg_base + IMR_LO_OFFSET, &imr.lo.raw);
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quarkX1000_msg_bus_read(MEM_MANAGER_PORT,
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reg_base + IMR_HI_OFFSET, &imr.hi.raw);
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quarkX1000_msg_bus_read(MEM_MANAGER_PORT,
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reg_base + IMR_RDMSK_OFFSET, &imr.rdmsk.raw);
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quarkX1000_msg_bus_read(MEM_MANAGER_PORT,
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reg_base + IMR_WRMSK_OFFSET, &imr.wrmsk.raw);
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return imr;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Overwrite the contents of the specified IMR.
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*/
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void
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quarkX1000_imr_write(uint32_t imr_idx, quarkX1000_imr_t imr)
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{
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uint32_t reg_base = IMR_BASE_OFFSET + (IMR_REG_COUNT * imr_idx);
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assert(imr_idx < QUARKX1000_IMR_CNT);
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quarkX1000_msg_bus_write(MEM_MANAGER_PORT,
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reg_base + IMR_HI_OFFSET, imr.hi.raw);
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quarkX1000_msg_bus_write(MEM_MANAGER_PORT,
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reg_base + IMR_RDMSK_OFFSET, imr.rdmsk.raw);
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quarkX1000_msg_bus_write(MEM_MANAGER_PORT,
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reg_base + IMR_WRMSK_OFFSET, imr.wrmsk.raw);
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/* This register must be programmed last, in case it sets the lock bit. */
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quarkX1000_msg_bus_write(MEM_MANAGER_PORT,
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reg_base + IMR_LO_OFFSET, imr.lo.raw);
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}
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/*---------------------------------------------------------------------------*/
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125
cpu/x86/drivers/quarkX1000/imr.h
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125
cpu/x86/drivers/quarkX1000/imr.h
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@ -0,0 +1,125 @@
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/*
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* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CPU_X86_DRIVERS_QUARKX1000_IMR_H_
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#define CPU_X86_DRIVERS_QUARKX1000_IMR_H_
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#include <stdint.h>
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typedef union quarkX1000_imr_lo {
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struct {
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uint32_t : 2;
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uint32_t addr : 22;
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uint32_t : 7;
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uint32_t lock : 1;
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};
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uint32_t raw;
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} quarkX1000_imr_lo_t;
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typedef union quarkX1000_imr_hi {
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struct {
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uint32_t : 2;
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uint32_t addr : 22;
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uint32_t : 8;
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};
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uint32_t raw;
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} quarkX1000_imr_hi_t;
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/* Amount to shift imr_lo/hi.addr left to obtain the bound address */
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#define QUARKX1000_IMR_SHAMT 10
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typedef union quarkX1000_imr_rdmsk {
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struct {
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uint32_t cpu0 : 1;
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uint32_t cpu_0 : 1;
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uint32_t : 6;
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uint32_t vc0_sai_id0 : 1;
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uint32_t vc0_sai_id1 : 1;
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uint32_t vc0_sai_id2 : 1;
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uint32_t vc0_sai_id3 : 1;
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uint32_t vc1_sai_id0 : 1;
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uint32_t vc1_sai_id1 : 1;
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uint32_t vc1_sai_id2 : 1;
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uint32_t vc1_sai_id3 : 1;
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uint32_t : 13;
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uint32_t punit : 1;
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uint32_t : 1;
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uint32_t esram_flush_init : 1;
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};
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uint32_t raw;
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} quarkX1000_imr_rdmsk_t;
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typedef union quarkX1000_imr_wrmsk {
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struct {
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uint32_t cpu0 : 1;
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uint32_t cpu_0 : 1;
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uint32_t : 6;
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uint32_t vc0_sai_id0 : 1;
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uint32_t vc0_sai_id1 : 1;
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uint32_t vc0_sai_id2 : 1;
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uint32_t vc0_sai_id3 : 1;
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uint32_t vc1_sai_id0 : 1;
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uint32_t vc1_sai_id1 : 1;
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uint32_t vc1_sai_id2 : 1;
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uint32_t vc1_sai_id3 : 1;
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uint32_t : 13;
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uint32_t punit : 1;
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uint32_t cpu_snoop : 1;
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uint32_t esram_flush_init : 1;
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};
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uint32_t raw;
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} quarkX1000_imr_wrmsk_t;
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/* Refer to Intel Quark SoC X1000 Datasheet, Section 12.7.4 for more details on
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* the IMR registers.
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*/
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typedef struct quarkX1000_imr {
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quarkX1000_imr_lo_t lo;
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quarkX1000_imr_hi_t hi;
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quarkX1000_imr_rdmsk_t rdmsk;
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quarkX1000_imr_wrmsk_t wrmsk;
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} quarkX1000_imr_t;
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/* The Intel Quark SoC X1000 defines eight general IMRs. */
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#define QUARKX1000_IMR_CNT 8
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/* Routines for accessing the Isolated Memory Region (IMR) feature.
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*
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* The Intel Quark X1000 SoC includes support for Isolated Memory Regions
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* (IMRs), which are specified using range registers and associated
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* control registers that are accessible via the message bus.
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*
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* Refer to Intel Quark SoC X1000 Datasheet, Section 12.2 for more information.
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*/
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quarkX1000_imr_t quarkX1000_imr_read(uint32_t imr_idx);
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void quarkX1000_imr_write(uint32_t imr_idx, quarkX1000_imr_t imr);
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#endif /* CPU_X86_DRIVERS_QUARKX1000_IMR_H_ */
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@ -34,6 +34,7 @@ Device drivers:
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* GPIO (default pinmux configuration is listed in
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platform/galileo/drivers/galileo-pinmux.c)
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* Intel Quark X1000 SoC message bus
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* Isolated Memory Regions (IMRs)
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Contiki APIs:
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* Clock module
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