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freebsd-nq/sys/arm/freescale/imx/imx_machdep.h

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Maximize available kva space by doing static device mapping from the top of the address space downwards, and then returning the lowest mapped device address from initarm_lastaddr(). This adds over 500MB of kva space compared to the old way of hardcoding the end address as 0xE0000000. Also, pre-map most of the SoC's common memory-mapped devices using 1MB section mappings so that all device access uses just a few TLB entries. Graphics devices aren't mapped this way yet, but probably should be. To provide this new functionality without pasting identical code into multiple imxNN_machdep.c files, rework the imx machdep code so that things common to the whole family of SoCs are in a new imx_machdep.c file. The rewritten imxNN_machdep.c files contain just things specific to an individual SoC.
2013-10-26 23:13:20 +00:00
/*-
* Copyright (c) 2013 Ian Lepore <ian@freebsd.org>
* 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef IMX_MACHDEP_H
#define IMX_MACHDEP_H
#include <sys/types.h>
/* Common functions, implemented in imx_machdep.c. */
void imx_devmap_addentry(vm_paddr_t _pa, vm_size_t _sz);
void imx_wdog_cpu_reset(vm_offset_t _wdcr_phys) __attribute__((__noreturn__));
Revamp the SoC identity numbering scheme to be more in line with the way Freescale numbers the chips in the ID registers.
2013-10-31 23:05:05 +00:00
/* From here down, routines are implemented in imxNN_machdep.c. */
Maximize available kva space by doing static device mapping from the top of the address space downwards, and then returning the lowest mapped device address from initarm_lastaddr(). This adds over 500MB of kva space compared to the old way of hardcoding the end address as 0xE0000000. Also, pre-map most of the SoC's common memory-mapped devices using 1MB section mappings so that all device access uses just a few TLB entries. Graphics devices aren't mapped this way yet, but probably should be. To provide this new functionality without pasting identical code into multiple imxNN_machdep.c files, rework the imx machdep code so that things common to the whole family of SoCs are in a new imx_machdep.c file. The rewritten imxNN_machdep.c files contain just things specific to an individual SoC.
2013-10-26 23:13:20 +00:00
/*
* SoC identity.
Revamp the SoC identity numbering scheme to be more in line with the way Freescale numbers the chips in the ID registers.
2013-10-31 23:05:05 +00:00
* According to the documentation, there is such a thing as an i.MX6 Dual
* (non-lite flavor). However, Freescale doesn't seem to have assigned it a
* number in their code for determining the SoC type in u-boot.
*
* To-do: put silicon revision numbers into the low-order bits somewhere.
Maximize available kva space by doing static device mapping from the top of the address space downwards, and then returning the lowest mapped device address from initarm_lastaddr(). This adds over 500MB of kva space compared to the old way of hardcoding the end address as 0xE0000000. Also, pre-map most of the SoC's common memory-mapped devices using 1MB section mappings so that all device access uses just a few TLB entries. Graphics devices aren't mapped this way yet, but probably should be. To provide this new functionality without pasting identical code into multiple imxNN_machdep.c files, rework the imx machdep code so that things common to the whole family of SoCs are in a new imx_machdep.c file. The rewritten imxNN_machdep.c files contain just things specific to an individual SoC.
2013-10-26 23:13:20 +00:00
*/
Revamp the SoC identity numbering scheme to be more in line with the way Freescale numbers the chips in the ID registers.
2013-10-31 23:05:05 +00:00
#define IMXSOC_51 0x51000000
#define IMXSOC_53 0x53000000
#define IMXSOC_6SL 0x60000000
#define IMXSOC_6DL 0x61000000
#define IMXSOC_6S 0x62000000
#define IMXSOC_6Q 0x63000000
#define IMXSOC_FAMSHIFT 28
Maximize available kva space by doing static device mapping from the top of the address space downwards, and then returning the lowest mapped device address from initarm_lastaddr(). This adds over 500MB of kva space compared to the old way of hardcoding the end address as 0xE0000000. Also, pre-map most of the SoC's common memory-mapped devices using 1MB section mappings so that all device access uses just a few TLB entries. Graphics devices aren't mapped this way yet, but probably should be. To provide this new functionality without pasting identical code into multiple imxNN_machdep.c files, rework the imx machdep code so that things common to the whole family of SoCs are in a new imx_machdep.c file. The rewritten imxNN_machdep.c files contain just things specific to an individual SoC.
2013-10-26 23:13:20 +00:00
u_int imx_soc_type(void);
u_int imx_soc_family(void);
void imx_devmap_init(void);
Add some bare-bones support for enabling usb and usbphy clocks. This is temporary code to keep imx development moving forward for now. In the long run we need a SoC-independant clock management API.
2013-10-30 14:33:15 +00:00
/*
* We need a clock management system that works across unrelated SoCs and
* devices. For now, to keep imx development moving, define some barebones
* functionality that can be shared within the imx family by having each SoC
* implement functions with a common name.
*
* The usb enable functions are best-effort. They turn on the usb otg, host,
* and phy clocks in a SoC-specific manner, but it may take a lot more than that
* to make usb work on a given board. In particular, it can require specific
* pinmux setup of gpio pins connected to external phy parts, voltage regulators
* and overcurrent detectors, and so on. On such boards, u-boot or other early
* board setup code has to handle those things.
*/
void imx_ccm_usb_enable(device_t _usbdev);
void imx_ccm_usbphy_enable(device_t _phydev);
Maximize available kva space by doing static device mapping from the top of the address space downwards, and then returning the lowest mapped device address from initarm_lastaddr(). This adds over 500MB of kva space compared to the old way of hardcoding the end address as 0xE0000000. Also, pre-map most of the SoC's common memory-mapped devices using 1MB section mappings so that all device access uses just a few TLB entries. Graphics devices aren't mapped this way yet, but probably should be. To provide this new functionality without pasting identical code into multiple imxNN_machdep.c files, rework the imx machdep code so that things common to the whole family of SoCs are in a new imx_machdep.c file. The rewritten imxNN_machdep.c files contain just things specific to an individual SoC.
2013-10-26 23:13:20 +00:00
#endif
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