arch/ppc/syslib/m8260_setup.c - kernel/msm-4.19 - Gitiles

 /*
  *  arch/ppc/syslib/m8260_setup.c
  *
  *  Copyright (C) 1995  Linus Torvalds
  *  Adapted from 'alpha' version by Gary Thomas
  *  Modified by Cort Dougan (cort@cs.nmt.edu)
  *  Modified for MBX using prep/chrp/pmac functions by Dan (dmalek@jlc.net)
  *  Further modified for generic 8xx and 8260 by Dan.
  */

 #include <linux/config.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/stddef.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/initrd.h>
 #include <linux/root_dev.h>
 #include <linux/seq_file.h>
 #include <linux/irq.h>

 #include <asm/mmu.h>
 #include <asm/io.h>
 #include <asm/pgtable.h>
 #include <asm/mpc8260.h>
 #include <asm/cpm2.h>
 #include <asm/machdep.h>
 #include <asm/bootinfo.h>
 #include <asm/time.h>

 #include "cpm2_pic.h"

 unsigned char __res[sizeof(bd_t)];

 extern void pq2_find_bridges(void);
 extern void pq2pci_init_irq(void);
 extern void idma_pci9_init(void);

 /* Place-holder for board-specific init */
 void __attribute__ ((weak)) __init
 m82xx_board_setup(void)
 {
 }

 static void __init
 m8260_setup_arch(void)
 {
 	/* Print out Vendor and Machine info. */
 	printk(KERN_INFO "%s %s port\n", CPUINFO_VENDOR, CPUINFO_MACHINE);

 	/* Reset the Communication Processor Module. */
 	cpm2_reset();
 #ifdef CONFIG_8260_PCI9
 	/* Initialise IDMA for PCI erratum workaround */
 	idma_pci9_init();
 #endif
 #ifdef CONFIG_PCI_8260
 	pq2_find_bridges();
 #endif
 #ifdef CONFIG_BLK_DEV_INITRD
 	if (initrd_start)
 		ROOT_DEV = Root_RAM0;
 #endif

 	identify_ppc_sys_by_name_and_id(BOARD_CHIP_NAME,
 				in_be32(CPM_MAP_ADDR + CPM_IMMR_OFFSET));

 	m82xx_board_setup();
 }

 /* The decrementer counts at the system (internal) clock frequency
  * divided by four.
  */
 static void __init
 m8260_calibrate_decr(void)
 {
 	bd_t *binfo = (bd_t *)__res;
 	int freq, divisor;

 	freq = binfo->bi_busfreq;
         divisor = 4;
         tb_ticks_per_jiffy = freq / HZ / divisor;
 	tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
 }

 /* The 8260 has an internal 1-second timer update register that
  * we should use for this purpose.
  */
 static uint rtc_time;

 static int
 m8260_set_rtc_time(unsigned long time)
 {
 	rtc_time = time;

 	return(0);
 }

 static unsigned long
 m8260_get_rtc_time(void)
 {
 	/* Get time from the RTC.
 	*/
 	return((unsigned long)rtc_time);
 }

 #ifndef BOOTROM_RESTART_ADDR
 #warning "Using default BOOTROM_RESTART_ADDR!"
 #define BOOTROM_RESTART_ADDR	0xff000104
 #endif

 static void
 m8260_restart(char *cmd)
 {
 	extern void m8260_gorom(bd_t *bi, uint addr);
 	uint	startaddr;

 	/* Most boot roms have a warmstart as the second instruction
 	 * of the reset vector.  If that doesn't work for you, change this
 	 * or the reboot program to send a proper address.
 	 */
 	startaddr = BOOTROM_RESTART_ADDR;
 	if (cmd != NULL) {
 		if (!strncmp(cmd, "startaddr=", 10))
 			startaddr = simple_strtoul(&cmd[10], NULL, 0);
 	}

 	m8260_gorom((void*)__pa(__res), startaddr);
 }

 static void
 m8260_halt(void)
 {
 	local_irq_disable();
 	while (1);
 }

 static void
 m8260_power_off(void)
 {
 	m8260_halt();
 }

 static int
 m8260_show_cpuinfo(struct seq_file *m)
 {
 	bd_t *bp = (bd_t *)__res;

 	seq_printf(m, "vendor\t\t: %s\n"
 		   "machine\t\t: %s\n"
 		   "\n"
 		   "mem size\t\t: 0x%08x\n"
 		   "console baud\t\t: %d\n"
 		   "\n"
 		   "core clock\t: %u MHz\n"
 		   "CPM  clock\t: %u MHz\n"
 		   "bus  clock\t: %u MHz\n",
 		   CPUINFO_VENDOR, CPUINFO_MACHINE, bp->bi_memsize,
 		   bp->bi_baudrate, bp->bi_intfreq / 1000000,
 		   bp->bi_cpmfreq / 1000000, bp->bi_busfreq / 1000000);
 	return 0;
 }

 /* Initialize the internal interrupt controller.  The number of
  * interrupts supported can vary with the processor type, and the
  * 8260 family can have up to 64.
  * External interrupts can be either edge or level triggered, and
  * need to be initialized by the appropriate driver.
  */
 static void __init
 m8260_init_IRQ(void)
 {
 	cpm2_init_IRQ();

 	/* Initialize the default interrupt mapping priorities,
 	 * in case the boot rom changed something on us.
 	 */
 	cpm2_immr->im_intctl.ic_siprr = 0x05309770;

 #if defined(CONFIG_PCI) && (defined(CONFIG_ADS8272) || defined(CONFIG_PQ2FADS))
  	/* Initialize stuff for the 82xx CPLD IC and install demux  */
  	pq2pci_init_irq();
 #endif

 }

 /*
  * Same hack as 8xx
  */
 static unsigned long __init
 m8260_find_end_of_memory(void)
 {
 	bd_t *binfo = (bd_t *)__res;

 	return binfo->bi_memsize;
 }

 /* Map the IMMR, plus anything else we can cover
  * in that upper space according to the memory controller
  * chip select mapping.  Grab another bunch of space
  * below that for stuff we can't cover in the upper.
  */
 static void __init
 m8260_map_io(void)
 {
 	uint addr;

 	/* Map IMMR region to a 256MB BAT */
 	addr = (cpm2_immr != NULL) ? (uint)cpm2_immr : CPM_MAP_ADDR;
 	io_block_mapping(addr, addr, 0x10000000, _PAGE_IO);

 	/* Map I/O region to a 256MB BAT */
 	io_block_mapping(IO_VIRT_ADDR, IO_PHYS_ADDR, 0x10000000, _PAGE_IO);
 }

 /* Place-holder for board-specific ppc_md hooking */
 void __attribute__ ((weak)) __init
 m82xx_board_init(void)
 {
 }

 /* Inputs:
  *   r3 - Optional pointer to a board information structure.
  *   r4 - Optional pointer to the physical starting address of the init RAM
  *        disk.
  *   r5 - Optional pointer to the physical ending address of the init RAM
  *        disk.
  *   r6 - Optional pointer to the physical starting address of any kernel
  *        command-line parameters.
  *   r7 - Optional pointer to the physical ending address of any kernel
  *        command-line parameters.
  */
 void __init
 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 	      unsigned long r6, unsigned long r7)
 {
 	parse_bootinfo(find_bootinfo());

 	if ( r3 )
 		memcpy( (void *)__res,(void *)(r3+KERNELBASE), sizeof(bd_t) );

 #ifdef CONFIG_BLK_DEV_INITRD
 	/* take care of initrd if we have one */
 	if ( r4 ) {
 		initrd_start = r4 + KERNELBASE;
 		initrd_end = r5 + KERNELBASE;
 	}
 #endif /* CONFIG_BLK_DEV_INITRD */
 	/* take care of cmd line */
 	if ( r6 ) {
 		*(char *)(r7+KERNELBASE) = 0;
 		strcpy(cmd_line, (char *)(r6+KERNELBASE));
 	}

 	ppc_md.setup_arch		= m8260_setup_arch;
 	ppc_md.show_cpuinfo		= m8260_show_cpuinfo;
 	ppc_md.init_IRQ			= m8260_init_IRQ;
 	ppc_md.get_irq			= cpm2_get_irq;

 	ppc_md.restart			= m8260_restart;
 	ppc_md.power_off		= m8260_power_off;
 	ppc_md.halt			= m8260_halt;

 	ppc_md.set_rtc_time		= m8260_set_rtc_time;
 	ppc_md.get_rtc_time		= m8260_get_rtc_time;
 	ppc_md.calibrate_decr		= m8260_calibrate_decr;

 	ppc_md.find_end_of_memory	= m8260_find_end_of_memory;
 	ppc_md.setup_io_mappings	= m8260_map_io;

 	/* Call back for board-specific settings and overrides. */
 	m82xx_board_init();
 }
	/*
	* arch/ppc/syslib/m8260_setup.c
	*
	* Copyright (C) 1995 Linus Torvalds
	* Adapted from 'alpha' version by Gary Thomas
	* Modified by Cort Dougan (cort@cs.nmt.edu)
	* Modified for MBX using prep/chrp/pmac functions by Dan (dmalek@jlc.net)
	* Further modified for generic 8xx and 8260 by Dan.
	*/

	#include <linux/config.h>
	#include <linux/sched.h>
	#include <linux/kernel.h>
	#include <linux/mm.h>
	#include <linux/stddef.h>
	#include <linux/slab.h>
	#include <linux/init.h>
	#include <linux/initrd.h>
	#include <linux/root_dev.h>
	#include <linux/seq_file.h>
	#include <linux/irq.h>

	#include <asm/mmu.h>
	#include <asm/io.h>
	#include <asm/pgtable.h>
	#include <asm/mpc8260.h>
	#include <asm/cpm2.h>
	#include <asm/machdep.h>
	#include <asm/bootinfo.h>
	#include <asm/time.h>

	#include "cpm2_pic.h"

	unsigned char __res[sizeof(bd_t)];

	extern void pq2_find_bridges(void);
	extern void pq2pci_init_irq(void);
	extern void idma_pci9_init(void);

	/* Place-holder for board-specific init */
	void __attribute__ ((weak)) __init
	m82xx_board_setup(void)
	{
	}

	static void __init
	m8260_setup_arch(void)
	{
	/* Print out Vendor and Machine info. */
	printk(KERN_INFO "%s %s port\n", CPUINFO_VENDOR, CPUINFO_MACHINE);

	/* Reset the Communication Processor Module. */
	cpm2_reset();
	#ifdef CONFIG_8260_PCI9
	/* Initialise IDMA for PCI erratum workaround */
	idma_pci9_init();
	#endif
	#ifdef CONFIG_PCI_8260
	pq2_find_bridges();
	#endif
	#ifdef CONFIG_BLK_DEV_INITRD
	if (initrd_start)
	ROOT_DEV = Root_RAM0;
	#endif

	identify_ppc_sys_by_name_and_id(BOARD_CHIP_NAME,
	in_be32(CPM_MAP_ADDR + CPM_IMMR_OFFSET));

	m82xx_board_setup();
	}

	/* The decrementer counts at the system (internal) clock frequency
	* divided by four.
	*/
	static void __init
	m8260_calibrate_decr(void)
	{
	bd_t binfo = (bd_t )__res;
	int freq, divisor;

	freq = binfo->bi_busfreq;
	divisor = 4;
	tb_ticks_per_jiffy = freq / HZ / divisor;
	tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
	}

	/* The 8260 has an internal 1-second timer update register that
	* we should use for this purpose.
	*/
	static uint rtc_time;

	static int
	m8260_set_rtc_time(unsigned long time)
	{
	rtc_time = time;

	return(0);
	}

	static unsigned long
	m8260_get_rtc_time(void)
	{
	/* Get time from the RTC.
	*/
	return((unsigned long)rtc_time);
	}

	#ifndef BOOTROM_RESTART_ADDR
	#warning "Using default BOOTROM_RESTART_ADDR!"
	#define BOOTROM_RESTART_ADDR 0xff000104
	#endif

	static void
	m8260_restart(char *cmd)
	{
	extern void m8260_gorom(bd_t *bi, uint addr);
	uint startaddr;

	/* Most boot roms have a warmstart as the second instruction
	* of the reset vector. If that doesn't work for you, change this
	* or the reboot program to send a proper address.
	*/
	startaddr = BOOTROM_RESTART_ADDR;
	if (cmd != NULL) {
	if (!strncmp(cmd, "startaddr=", 10))
	startaddr = simple_strtoul(&cmd[10], NULL, 0);
	}

	m8260_gorom((void*)__pa(__res), startaddr);
	}

	static void
	m8260_halt(void)
	{
	local_irq_disable();
	while (1);
	}

	static void
	m8260_power_off(void)
	{
	m8260_halt();
	}

	static int
	m8260_show_cpuinfo(struct seq_file *m)
	{
	bd_t bp = (bd_t )__res;

	seq_printf(m, "vendor\t\t: %s\n"
	"machine\t\t: %s\n"
	"\n"
	"mem size\t\t: 0x%08x\n"
	"console baud\t\t: %d\n"
	"\n"
	"core clock\t: %u MHz\n"
	"CPM clock\t: %u MHz\n"
	"bus clock\t: %u MHz\n",
	CPUINFO_VENDOR, CPUINFO_MACHINE, bp->bi_memsize,
	bp->bi_baudrate, bp->bi_intfreq / 1000000,
	bp->bi_cpmfreq / 1000000, bp->bi_busfreq / 1000000);
	return 0;
	}

	/* Initialize the internal interrupt controller. The number of
	* interrupts supported can vary with the processor type, and the
	* 8260 family can have up to 64.
	* External interrupts can be either edge or level triggered, and
	* need to be initialized by the appropriate driver.
	*/
	static void __init
	m8260_init_IRQ(void)
	{
	cpm2_init_IRQ();

	/* Initialize the default interrupt mapping priorities,
	* in case the boot rom changed something on us.
	*/
	cpm2_immr->im_intctl.ic_siprr = 0x05309770;

	#if defined(CONFIG_PCI) && (defined(CONFIG_ADS8272) \|\| defined(CONFIG_PQ2FADS))
	/* Initialize stuff for the 82xx CPLD IC and install demux */
	pq2pci_init_irq();
	#endif

	}

	/*
	* Same hack as 8xx
	*/
	static unsigned long __init
	m8260_find_end_of_memory(void)
	{
	bd_t binfo = (bd_t )__res;

	return binfo->bi_memsize;
	}

	/* Map the IMMR, plus anything else we can cover
	* in that upper space according to the memory controller
	* chip select mapping. Grab another bunch of space
	* below that for stuff we can't cover in the upper.
	*/
	static void __init
	m8260_map_io(void)
	{
	uint addr;

	/* Map IMMR region to a 256MB BAT */
	addr = (cpm2_immr != NULL) ? (uint)cpm2_immr : CPM_MAP_ADDR;
	io_block_mapping(addr, addr, 0x10000000, _PAGE_IO);

	/* Map I/O region to a 256MB BAT */
	io_block_mapping(IO_VIRT_ADDR, IO_PHYS_ADDR, 0x10000000, _PAGE_IO);
	}

	/* Place-holder for board-specific ppc_md hooking */
	void __attribute__ ((weak)) __init
	m82xx_board_init(void)
	{
	}

	/* Inputs:
	* r3 - Optional pointer to a board information structure.
	* r4 - Optional pointer to the physical starting address of the init RAM
	* disk.
	* r5 - Optional pointer to the physical ending address of the init RAM
	* disk.
	* r6 - Optional pointer to the physical starting address of any kernel
	* command-line parameters.
	* r7 - Optional pointer to the physical ending address of any kernel
	* command-line parameters.
	*/
	void __init
	platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
	unsigned long r6, unsigned long r7)
	{
	parse_bootinfo(find_bootinfo());

	if ( r3 )
	memcpy( (void )__res,(void )(r3+KERNELBASE), sizeof(bd_t) );

	#ifdef CONFIG_BLK_DEV_INITRD
	/* take care of initrd if we have one */
	if ( r4 ) {
	initrd_start = r4 + KERNELBASE;
	initrd_end = r5 + KERNELBASE;
	}
	#endif /* CONFIG_BLK_DEV_INITRD */
	/* take care of cmd line */
	if ( r6 ) {
	(char )(r7+KERNELBASE) = 0;
	strcpy(cmd_line, (char *)(r6+KERNELBASE));
	}

	ppc_md.setup_arch = m8260_setup_arch;
	ppc_md.show_cpuinfo = m8260_show_cpuinfo;
	ppc_md.init_IRQ = m8260_init_IRQ;
	ppc_md.get_irq = cpm2_get_irq;

	ppc_md.restart = m8260_restart;
	ppc_md.power_off = m8260_power_off;
	ppc_md.halt = m8260_halt;

	ppc_md.set_rtc_time = m8260_set_rtc_time;
	ppc_md.get_rtc_time = m8260_get_rtc_time;
	ppc_md.calibrate_decr = m8260_calibrate_decr;

	ppc_md.find_end_of_memory = m8260_find_end_of_memory;
	ppc_md.setup_io_mappings = m8260_map_io;

	/* Call back for board-specific settings and overrides. */
	m82xx_board_init();
	}