- 根目录:
- arch
- mips
- pmcs-msp71xx
- msp_prom.c
/*
* BRIEF MODULE DESCRIPTION
* PROM library initialisation code, assuming a version of
* pmon is the boot code.
*
* Copyright 2000,2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* This file was derived from Carsten Langgaard's
* arch/mips/mips-boards/xx files.
*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``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 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>
#include <asm-generic/sections.h>
#include <asm/page.h>
#include <msp_prom.h>
#include <msp_regs.h>
/* global PROM environment variables and pointers */
int prom_argc;
char **prom_argv, **prom_envp;
int *prom_vec;
/* debug flag */
int init_debug = 1;
/* memory blocks */
struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
/* default feature sets */
static char msp_default_features[] =
#if defined(CONFIG_PMC_MSP4200_EVAL) \
|| defined(CONFIG_PMC_MSP4200_GW)
"ERER";
#elif defined(CONFIG_PMC_MSP7120_EVAL) \
|| defined(CONFIG_PMC_MSP7120_GW)
"EMEMSP";
#elif defined(CONFIG_PMC_MSP7120_FPGA)
"EMEM";
#endif
/* conversion functions */
static inline unsigned char str2hexnum(unsigned char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
return 0; /* foo */
}
int str2eaddr(unsigned char *ea, unsigned char *str)
{
int index = 0;
unsigned char num = 0;
while (*str != '\0') {
if ((*str == '.') || (*str == ':')) {
ea[index++] = num;
num = 0;
str++;
} else {
num = num << 4;
num |= str2hexnum(*str++);
}
}
if (index == 5) {
ea[index++] = num;
return 0;
} else
return -1;
}
EXPORT_SYMBOL(str2eaddr);
static inline unsigned long str2hex(unsigned char *str)
{
int value = 0;
while (*str) {
value = value << 4;
value |= str2hexnum(*str++);
}
return value;
}
/* function to query the system information */
const char *get_system_type(void)
{
#if defined(CONFIG_PMC_MSP4200_EVAL)
return "PMC-Sierra MSP4200 Eval Board";
#elif defined(CONFIG_PMC_MSP4200_GW)
return "PMC-Sierra MSP4200 VoIP Gateway";
#elif defined(CONFIG_PMC_MSP7120_EVAL)
return "PMC-Sierra MSP7120 Eval Board";
#elif defined(CONFIG_PMC_MSP7120_GW)
return "PMC-Sierra MSP7120 Residential Gateway";
#elif defined(CONFIG_PMC_MSP7120_FPGA)
return "PMC-Sierra MSP7120 FPGA";
#else
#error "What is the type of *your* MSP?"
#endif
}
int get_ethernet_addr(char *ethaddr_name, char *ethernet_addr)
{
char *ethaddr_str;
ethaddr_str = prom_getenv(ethaddr_name);
if (!ethaddr_str) {
printk(KERN_WARNING "%s not set in boot prom\n", ethaddr_name);
return -1;
}
if (str2eaddr(ethernet_addr, ethaddr_str) == -1) {
printk(KERN_WARNING "%s badly formatted-<%s>\n",
ethaddr_name, ethaddr_str);
return -1;
}
if (init_debug > 1) {
int i;
printk(KERN_DEBUG "get_ethernet_addr: for %s ", ethaddr_name);
for (i = 0; i < 5; i++)
printk(KERN_DEBUG "%02x:",
(unsigned char)*(ethernet_addr+i));
printk(KERN_DEBUG "%02x\n", *(ethernet_addr+i));
}
return 0;
}
EXPORT_SYMBOL(get_ethernet_addr);
static char *get_features(void)
{
char *feature = prom_getenv(FEATURES);
if (feature == NULL) {
/* default features based on MACHINE_TYPE */
feature = msp_default_features;
}
return feature;
}
static char test_feature(char c)
{
char *feature = get_features();
while (*feature) {
if (*feature++ == c)
return *feature;
feature++;
}
return FEATURE_NOEXIST;
}
unsigned long get_deviceid(void)
{
char *deviceid = prom_getenv(DEVICEID);
if (deviceid == NULL)
return *DEV_ID_REG;
else
return str2hex(deviceid);
}
char identify_pci(void)
{
return test_feature(PCI_KEY);
}
EXPORT_SYMBOL(identify_pci);
char identify_pcimux(void)
{
return test_feature(PCIMUX_KEY);
}
char identify_sec(void)
{
return test_feature(SEC_KEY);
}
EXPORT_SYMBOL(identify_sec);
char identify_spad(void)
{
return test_feature(SPAD_KEY);
}
EXPORT_SYMBOL(identify_spad);
char identify_tdm(void)
{
return test_feature(TDM_KEY);
}
EXPORT_SYMBOL(identify_tdm);
char identify_zsp(void)
{
return test_feature(ZSP_KEY);
}
EXPORT_SYMBOL(identify_zsp);
static char identify_enetfeature(char key, unsigned long interface_num)
{
char *feature = get_features();
while (*feature) {
if (*feature++ == key && interface_num-- == 0)
return *feature;
feature++;
}
return FEATURE_NOEXIST;
}
char identify_enet(unsigned long interface_num)
{
return identify_enetfeature(ENET_KEY, interface_num);
}
EXPORT_SYMBOL(identify_enet);
char identify_enetTxD(unsigned long interface_num)
{
return identify_enetfeature(ENETTXD_KEY, interface_num);
}
EXPORT_SYMBOL(identify_enetTxD);
unsigned long identify_family(void)
{
unsigned long deviceid;
deviceid = get_deviceid();
return deviceid & CPU_DEVID_FAMILY;
}
EXPORT_SYMBOL(identify_family);
unsigned long identify_revision(void)
{
unsigned long deviceid;
deviceid = get_deviceid();
return deviceid & CPU_DEVID_REVISION;
}
EXPORT_SYMBOL(identify_revision);
/* PROM environment functions */
char *prom_getenv(char *env_name)
{
/*
* Return a pointer to the given environment variable. prom_envp
* points to a null terminated array of pointers to variables.
* Environment variables are stored in the form of "memsize=64"
*/
char **var = prom_envp;
int i = strlen(env_name);
while (*var) {
if (strncmp(env_name, *var, i) == 0) {
return *var + strlen(env_name) + 1;
}
var++;
}
return NULL;
}
/* PROM commandline functions */
void __init prom_init_cmdline(void)
{
char *cp;
int actr;
actr = 1; /* Always ignore argv[0] */
cp = &(arcs_cmdline[0]);
while (actr < prom_argc) {
strcpy(cp, prom_argv[actr]);
cp += strlen(prom_argv[actr]);
*cp++ = ' ';
actr++;
}
if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
--cp;
*cp = '\0';
}
/* memory allocation functions */
static int __init prom_memtype_classify(unsigned int type)
{
switch (type) {
case yamon_free:
return BOOT_MEM_RAM;
case yamon_prom:
return BOOT_MEM_ROM_DATA;
default:
return BOOT_MEM_RESERVED;
}
}
void __init prom_meminit(void)
{
struct prom_pmemblock *p;
p = prom_getmdesc();
while (p->size) {
long type;
unsigned long base, size;
type = prom_memtype_classify(p->type);
base = p->base;
size = p->size;
add_memory_region(base, size, type);
p++;
}
}
void __init prom_free_prom_memory(void)
{
int argc;
char **argv;
char **envp;
char *ptr;
int len = 0;
int i;
unsigned long addr;
/*
* preserve environment variables and command line from pmon/bbload
* first preserve the command line
*/
for (argc = 0; argc < prom_argc; argc++) {
len += sizeof(char *); /* length of pointer */
len += strlen(prom_argv[argc]) + 1; /* length of string */
}
len += sizeof(char *); /* plus length of null pointer */
argv = kmalloc(len, GFP_KERNEL);
ptr = (char *) &argv[prom_argc + 1]; /* strings follow array */
for (argc = 0; argc < prom_argc; argc++) {
argv[argc] = ptr;
strcpy(ptr, prom_argv[argc]);
ptr += strlen(prom_argv[argc]) + 1;
}
argv[prom_argc] = NULL; /* end array with null pointer */
prom_argv = argv;
/* next preserve the environment variables */
len = 0;
i = 0;
for (envp = prom_envp; *envp != NULL; envp++) {
i++; /* count number of environment variables */
len += sizeof(char *); /* length of pointer */
len += strlen(*envp) + 1; /* length of string */
}
len += sizeof(char *); /* plus length of null pointer */
envp = kmalloc(len, GFP_KERNEL);
ptr = (char *) &envp[i+1];
for (argc = 0; argc < i; argc++) {
envp[argc] = ptr;
strcpy(ptr, prom_envp[argc]);
ptr += strlen(prom_envp[argc]) + 1;
}
envp[i] = NULL; /* end array with null pointer */
prom_envp = envp;
for (i = 0; i < boot_mem_map.nr_map; i++) {
if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
continue;
addr = boot_mem_map.map[i].addr;
free_init_pages("prom memory",
addr, addr + boot_mem_map.map[i].size);
}
}
struct prom_pmemblock *__init prom_getmdesc(void)
{
static char memsz_env[] __initdata = "memsize";
static char heaptop_env[] __initdata = "heaptop";
char *str;
unsigned int memsize;
unsigned int heaptop;
int i;
str = prom_getenv(memsz_env);
if (!str) {
ppfinit("memsize not set in boot prom, "
"set to default (32Mb)\n");
memsize = 0x02000000;
} else {
memsize = simple_strtol(str, NULL, 0);
if (memsize == 0) {
/* if memsize is a bad size, use reasonable default */
memsize = 0x02000000;
}
/* convert to physical address (removing caching bits, etc) */
memsize = CPHYSADDR(memsize);
}
str = prom_getenv(heaptop_env);
if (!str) {
heaptop = CPHYSADDR((u32)&_text);
ppfinit("heaptop not set in boot prom, "
"set to default 0x%08x\n", heaptop);
} else {
heaptop = simple_strtol(str, NULL, 16);
if (heaptop == 0) {
/* heaptop conversion bad, might have 0xValue */
heaptop = simple_strtol(str, NULL, 0);
if (heaptop == 0) {
/* heaptop still bad, use reasonable default */
heaptop = CPHYSADDR((u32)&_text);
}
}
/* convert to physical address (removing caching bits, etc) */
heaptop = CPHYSADDR((u32)heaptop);
}
/* the base region */
i = 0;
mdesc[i].type = BOOT_MEM_RESERVED;
mdesc[i].base = 0x00000000;
mdesc[i].size = PAGE_ALIGN(0x300 + 0x80);
/* jtag interrupt vector + sizeof vector */
/* PMON data */
if (heaptop > mdesc[i].base + mdesc[i].size) {
i++; /* 1 */
mdesc[i].type = BOOT_MEM_ROM_DATA;
mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
mdesc[i].size = heaptop - mdesc[i].base;
}
/* end of PMON data to start of kernel -- probably zero .. */
if (heaptop != CPHYSADDR((u32)_text)) {
i++; /* 2 */
mdesc[i].type = BOOT_MEM_RAM;
mdesc[i].base = heaptop;
mdesc[i].size = CPHYSADDR((u32)_text) - mdesc[i].base;
}
/* kernel proper */
i++; /* 3 */
mdesc[i].type = BOOT_MEM_RESERVED;
mdesc[i].base = CPHYSADDR((u32)_text);
mdesc[i].size = CPHYSADDR(PAGE_ALIGN((u32)_end)) - mdesc[i].base;
/* Remainder of RAM -- under memsize */
i++; /* 5 */
mdesc[i].type = yamon_free;
mdesc[i].base = mdesc[i-1].base + mdesc[i-1].size;
mdesc[i].size = memsize - mdesc[i].base;
return &mdesc[0];
}