iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
ece9ae6515
linux/arch/m68k/coldfire/m54xx.c

130 lines
3.5 KiB
C
Raw Normal View History

m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
/***************************************************************************/
/*
m68k: fix crufty ColdFire intro comments Quite a few of the ColdFire specific support files have a pathname in the title comments of the file. These files have moved around a bit over the years, and most are no longer accurate. Remove the pathname and fix the comments to include at least a short description of the files contents. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-08-19 05:55:24 +04:00
* m54xx.c -- platform support for ColdFire 54xx based boards
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
*
* Copyright (C) 2010, Philippe De Muyter <phdm@macqel.be>
*/
/***************************************************************************/
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
m68k: add ColdFire 54xx CPU MMU memory init code Add code to the 54xx ColdFire CPU init to setup memory ready for the m68k paged memory start up. Some of the RAM variables that were specific to the non-mmu code paths now need to be used during this setup, so when CONFIG_MMU is enabled. Move these out of page_no.h and into page.h. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-10-14 09:06:22 +04:00
#include <linux/mm.h>
m68knommu: add clock definitions for 54xx ColdFire CPU types Add a base set of clocks for the 54xx ColdFire CPU types. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-07-13 10:07:15 +04:00
#include <linux/clk.h>
m68k: add ColdFire 54xx CPU MMU memory init code Add code to the 54xx ColdFire CPU init to setup memory ready for the m68k paged memory start up. Some of the RAM variables that were specific to the non-mmu code paths now need to be used during this setup, so when CONFIG_MMU is enabled. Move these out of page_no.h and into page.h. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-10-14 09:06:22 +04:00
#include <linux/bootmem.h>
#include <asm/pgalloc.h>
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
#include <asm/machdep.h>
#include <asm/coldfire.h>
m68knommu: make Coldfire 548x support more generic The ColdFire 547x family of processors is very similar to the ColdFire 548x series. Almost all of the support for them is the same. Make the code supporting the 548x more gneric, so it will be capable of supporting both families. For the most part this is a renaming excerise to make the support code more obviously apply to both families. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-11-02 05:05:29 +03:00
#include <asm/m54xxsim.h>
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
#include <asm/mcfuart.h>
m68knommu: add clock definitions for 54xx ColdFire CPU types Add a base set of clocks for the 54xx ColdFire CPU types. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-07-13 10:07:15 +04:00
#include <asm/mcfclk.h>
m68knommu: make Coldfire 548x support more generic The ColdFire 547x family of processors is very similar to the ColdFire 548x series. Almost all of the support for them is the same. Make the code supporting the 548x more gneric, so it will be capable of supporting both families. For the most part this is a renaming excerise to make the support code more obviously apply to both families. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-11-02 05:05:29 +03:00
#include <asm/m54xxgpt.h>
m68knommu: add clock definitions for 54xx ColdFire CPU types Add a base set of clocks for the 54xx ColdFire CPU types. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-07-13 10:07:15 +04:00
#include <asm/mcfclk.h>
m68k: add ColdFire 54xx CPU MMU memory init code Add code to the 54xx ColdFire CPU init to setup memory ready for the m68k paged memory start up. Some of the RAM variables that were specific to the non-mmu code paths now need to be used during this setup, so when CONFIG_MMU is enabled. Move these out of page_no.h and into page.h. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-10-14 09:06:22 +04:00
#ifdef CONFIG_MMU
#include <asm/mmu_context.h>
#endif
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
/***************************************************************************/
m68knommu: add clock definitions for 54xx ColdFire CPU types Add a base set of clocks for the 54xx ColdFire CPU types. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-07-13 10:07:15 +04:00
DEFINE_CLK(pll, "pll.0", MCF_CLK);
DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
DEFINE_CLK(mcfslt0, "mcfslt.0", MCF_BUSCLK);
DEFINE_CLK(mcfslt1, "mcfslt.1", MCF_BUSCLK);
DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
DEFINE_CLK(mcfuart2, "mcfuart.2", MCF_BUSCLK);
DEFINE_CLK(mcfuart3, "mcfuart.3", MCF_BUSCLK);
struct clk *mcf_clks[] = {
&clk_pll,
&clk_sys,
&clk_mcfslt0,
&clk_mcfslt1,
&clk_mcfuart0,
&clk_mcfuart1,
&clk_mcfuart2,
&clk_mcfuart3,
NULL
};
/***************************************************************************/
m68knommu: make Coldfire 548x support more generic The ColdFire 547x family of processors is very similar to the ColdFire 548x series. Almost all of the support for them is the same. Make the code supporting the 548x more gneric, so it will be capable of supporting both families. For the most part this is a renaming excerise to make the support code more obviously apply to both families. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-11-02 05:05:29 +03:00
static void __init m54xx_uarts_init(void)
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
{
m68knommu: simplify the 54xx UART setup code Simplify the UART setup code so that it no longer loops for each UART present. Just make it do all the work it needs in a single function. This will make the code easier to share when we move to a single set of platform data for ColdFire UARTs. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-12-23 19:08:47 +04:00
/* enable io pins */
m68knommu: clean up Pin Assignment definitions for the 54xx ColdFire CPU The Pin Assignment register definitions for the ColdFire 54xx CPU family are inconsistently named and defined compared to the other ColdFire part definitions. Rename them with the same prefix as used on other parts, MCFGPIO_PAR_, and make their definitions include the MCF_MBAR periphperal region offset. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-09-18 08:34:04 +04:00
__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC0);
m68knommu: simplify the 54xx UART setup code Simplify the UART setup code so that it no longer loops for each UART present. Just make it do all the work it needs in a single function. This will make the code easier to share when we move to a single set of platform data for ColdFire UARTs. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-12-23 19:08:47 +04:00
__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS,
m68knommu: clean up Pin Assignment definitions for the 54xx ColdFire CPU The Pin Assignment register definitions for the ColdFire 54xx CPU family are inconsistently named and defined compared to the other ColdFire part definitions. Rename them with the same prefix as used on other parts, MCFGPIO_PAR_, and make their definitions include the MCF_MBAR periphperal region offset. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-09-18 08:34:04 +04:00
MCFGPIO_PAR_PSC1);
m68knommu: simplify the 54xx UART setup code Simplify the UART setup code so that it no longer loops for each UART present. Just make it do all the work it needs in a single function. This will make the code easier to share when we move to a single set of platform data for ColdFire UARTs. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2011-12-23 19:08:47 +04:00
__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS |
m68knommu: clean up Pin Assignment definitions for the 54xx ColdFire CPU The Pin Assignment register definitions for the ColdFire 54xx CPU family are inconsistently named and defined compared to the other ColdFire part definitions. Rename them with the same prefix as used on other parts, MCFGPIO_PAR_, and make their definitions include the MCF_MBAR periphperal region offset. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-09-18 08:34:04 +04:00
MCF_PAR_PSC_CTS_CTS, MCFGPIO_PAR_PSC2);
__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC3);
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
}
/***************************************************************************/
m68knommu: make Coldfire 548x support more generic The ColdFire 547x family of processors is very similar to the ColdFire 548x series. Almost all of the support for them is the same. Make the code supporting the 548x more gneric, so it will be capable of supporting both families. For the most part this is a renaming excerise to make the support code more obviously apply to both families. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-11-02 05:05:29 +03:00
static void mcf54xx_reset(void)
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
{
/* disable interrupts and enable the watchdog */
asm("movew #0x2700, %sr\n");
m68knommu: clean up ColdFire 54xx General Timer definitions Convert the ColdFire 54xx CPU General Timer register address definitions to include the MCF_MBAR peripheral region offset. This makes them consistent with all other 54xx address register definitions (in m54xxsim.h). The goal is to reduce different definitions used (some including offsets and others not) causing bugs when used incorrectly. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-09-18 08:51:46 +04:00
__raw_writel(0, MCF_GPT_GMS0);
__raw_writel(MCF_GPT_GCIR_CNT(1), MCF_GPT_GCIR0);
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
__raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4),
m68knommu: clean up ColdFire 54xx General Timer definitions Convert the ColdFire 54xx CPU General Timer register address definitions to include the MCF_MBAR peripheral region offset. This makes them consistent with all other 54xx address register definitions (in m54xxsim.h). The goal is to reduce different definitions used (some including offsets and others not) causing bugs when used incorrectly. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-09-18 08:51:46 +04:00
MCF_GPT_GMS0);
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
}
/***************************************************************************/
m68k: add ColdFire 54xx CPU MMU memory init code Add code to the 54xx ColdFire CPU init to setup memory ready for the m68k paged memory start up. Some of the RAM variables that were specific to the non-mmu code paths now need to be used during this setup, so when CONFIG_MMU is enabled. Move these out of page_no.h and into page.h. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-10-14 09:06:22 +04:00
#ifdef CONFIG_MMU
unsigned long num_pages;
static void __init mcf54xx_bootmem_alloc(void)
{
unsigned long start_pfn;
unsigned long memstart;
/* _rambase and _ramend will be naturally page aligned */
m68k_memory[0].addr = _rambase;
m68k_memory[0].size = _ramend - _rambase;
/* compute total pages in system */
num_pages = (_ramend - _rambase) >> PAGE_SHIFT;
/* page numbers */
memstart = PAGE_ALIGN(_ramstart);
min_low_pfn = _rambase >> PAGE_SHIFT;
start_pfn = memstart >> PAGE_SHIFT;
max_low_pfn = _ramend >> PAGE_SHIFT;
high_memory = (void *)_ramend;
m68k_virt_to_node_shift = fls(_ramend - _rambase - 1) - 6;
module_fixup(NULL, __start_fixup, __stop_fixup);
/* setup bootmem data */
m68k_setup_node(0);
memstart += init_bootmem_node(NODE_DATA(0), start_pfn,
min_low_pfn, max_low_pfn);
free_bootmem_node(NODE_DATA(0), memstart, _ramend - memstart);
}
#endif /* CONFIG_MMU */
/***************************************************************************/
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
void __init config_BSP(char *commandp, int size)
{
m68k: add ColdFire 54xx CPU MMU memory init code Add code to the 54xx ColdFire CPU init to setup memory ready for the m68k paged memory start up. Some of the RAM variables that were specific to the non-mmu code paths now need to be used during this setup, so when CONFIG_MMU is enabled. Move these out of page_no.h and into page.h. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2011-10-14 09:06:22 +04:00
#ifdef CONFIG_MMU
mcf54xx_bootmem_alloc();
mmu_context_init();
#endif
m68knommu: make Coldfire 548x support more generic The ColdFire 547x family of processors is very similar to the ColdFire 548x series. Almost all of the support for them is the same. Make the code supporting the 548x more gneric, so it will be capable of supporting both families. For the most part this is a renaming excerise to make the support code more obviously apply to both families. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-11-02 05:05:29 +03:00
mach_reset = mcf54xx_reset;
m68knommu: modify timer init code to make it consistent with m68k code With a few small changes we can make the m68knommu timer init code the same as the m68k code. By using the mach_sched_init function pointer and reworking the current timer initializers to keep track of the common m68k timer_interrupt() handler we end up with almost identical code for m68knommu. This will allow us to more easily merge the mmu and non-mmu m68k time.c in future patches. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2012-01-23 09:34:58 +04:00
mach_sched_init = hw_timer_init;
m68knommu: make Coldfire 548x support more generic The ColdFire 547x family of processors is very similar to the ColdFire 548x series. Almost all of the support for them is the same. Make the code supporting the 548x more gneric, so it will be capable of supporting both families. For the most part this is a renaming excerise to make the support code more obviously apply to both families. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-11-02 05:05:29 +03:00
m54xx_uarts_init();
m68knommu: add basic mmu-less m548x support Add a very basic mmu-less support for coldfire m548x family. This is perhaps also valid for m547x family. The port comprises the serial, tick timer and reboot support. The gpio part compiles but is empty. This gives a functional albeit limited linux for the m548x coldfire family. This has been tested on a Freescale M548xEVB Lite board with a M5484 processor and the default dbug monitor. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-09-20 15:11:11 +04:00
}
/***************************************************************************/
Reference in New Issue Copy Permalink