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linuxdebug/arch/parisc/kernel/setup.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Initial setup-routines for HP 9000 based hardware.
*
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
* Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de>
* Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
* Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net>
* Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org>
* Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net>
*
* Initial PA-RISC Version: 04-23-1999 by Helge Deller
*/
#include <linux/kernel.h>
#include <linux/initrd.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/seq_file.h>
#define PCI_DEBUG
#include <linux/pci.h>
#undef PCI_DEBUG
#include <linux/proc_fs.h>
#include <linux/export.h>
#include <linux/sched.h>
#include <linux/sched/clock.h>
#include <linux/start_kernel.h>
#include <asm/cacheflush.h>
#include <asm/processor.h>
#include <asm/sections.h>
#include <asm/pdc.h>
#include <asm/led.h>
#include <asm/machdep.h> /* for pa7300lc_init() proto */
#include <asm/pdc_chassis.h>
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/unwind.h>
#include <asm/smp.h>
static char __initdata command_line[COMMAND_LINE_SIZE];
/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
void __init setup_cmdline(char **cmdline_p)
{
extern unsigned int boot_args[];
char *p;
/* Collect stuff passed in from the boot loader */
/* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
if (boot_args[0] < 64) {
/* called from hpux boot loader */
boot_command_line[0] = '\0';
} else {
strscpy(boot_command_line, (char *)__va(boot_args[1]),
COMMAND_LINE_SIZE);
/* autodetect console type (if not done by palo yet) */
p = boot_command_line;
if (!str_has_prefix(p, "console=") && !strstr(p, " console=")) {
strlcat(p, " console=", COMMAND_LINE_SIZE);
if (PAGE0->mem_cons.cl_class == CL_DUPLEX)
strlcat(p, "ttyS0", COMMAND_LINE_SIZE);
else
strlcat(p, "tty0", COMMAND_LINE_SIZE);
}
/* default to use early console */
if (!strstr(p, "earlycon"))
strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE);
#ifdef CONFIG_BLK_DEV_INITRD
if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
{
initrd_start = (unsigned long)__va(boot_args[2]);
initrd_end = (unsigned long)__va(boot_args[3]);
}
#endif
}
strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;
}
#ifdef CONFIG_PA11
void __init dma_ops_init(void)
{
switch (boot_cpu_data.cpu_type) {
case pcx:
/*
* We've got way too many dependencies on 1.1 semantics
* to support 1.0 boxes at this point.
*/
panic( "PA-RISC Linux currently only supports machines that conform to\n"
"the PA-RISC 1.1 or 2.0 architecture specification.\n");
case pcxl2:
pa7300lc_init();
break;
default:
break;
}
}
#endif
extern void collect_boot_cpu_data(void);
void __init setup_arch(char **cmdline_p)
{
#ifdef CONFIG_64BIT
extern int parisc_narrow_firmware;
#endif
unwind_init();
init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
#ifdef CONFIG_64BIT
printk(KERN_INFO "The 64-bit Kernel has started...\n");
#else
printk(KERN_INFO "The 32-bit Kernel has started...\n");
#endif
printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
(int)(PAGE_SIZE / 1024));
#ifdef CONFIG_HUGETLB_PAGE
printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
#else
printk(KERN_CONT "disabled");
#endif
printk(KERN_CONT ".\n");
/*
* Check if initial kernel page mappings are sufficient.
* panic early if not, else we may access kernel functions
* and variables which can't be reached.
*/
if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
panic("KERNEL_INITIAL_ORDER too small!");
#ifdef CONFIG_64BIT
if(parisc_narrow_firmware) {
printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
}
#endif
setup_pdc();
setup_cmdline(cmdline_p);
collect_boot_cpu_data();
do_memory_inventory(); /* probe for physical memory */
parisc_cache_init();
paging_init();
#ifdef CONFIG_CHASSIS_LCD_LED
/* initialize the LCD/LED after boot_cpu_data is available ! */
led_init(); /* LCD/LED initialization */
#endif
#ifdef CONFIG_PA11
dma_ops_init();
#endif
clear_sched_clock_stable();
}
/*
* Display CPU info for all CPUs.
* for parisc this is in processor.c
*/
extern int show_cpuinfo (struct seq_file *m, void *v);
static void *
c_start (struct seq_file *m, loff_t *pos)
{
/* Looks like the caller will call repeatedly until we return
* 0, signaling EOF perhaps. This could be used to sequence
* through CPUs for example. Since we print all cpu info in our
* show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
* we only allow for one "position". */
return ((long)*pos < 1) ? (void *)1 : NULL;
}
static void *
c_next (struct seq_file *m, void *v, loff_t *pos)
{
++*pos;
return c_start(m, pos);
}
static void
c_stop (struct seq_file *m, void *v)
{
}
const struct seq_operations cpuinfo_op = {
.start = c_start,
.next = c_next,
.stop = c_stop,
.show = show_cpuinfo
};
static void __init parisc_proc_mkdir(void)
{
/*
** Can't call proc_mkdir() until after proc_root_init() has been
** called by start_kernel(). In other words, this code can't
** live in arch/.../setup.c because start_parisc() calls
** start_kernel().
*/
switch (boot_cpu_data.cpu_type) {
case pcxl:
case pcxl2:
if (NULL == proc_gsc_root)
{
proc_gsc_root = proc_mkdir("bus/gsc", NULL);
}
break;
case pcxt_:
case pcxu:
case pcxu_:
case pcxw:
case pcxw_:
case pcxw2:
if (NULL == proc_runway_root)
{
proc_runway_root = proc_mkdir("bus/runway", NULL);
}
break;
case mako:
case mako2:
if (NULL == proc_mckinley_root)
{
proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
}
break;
default:
/* FIXME: this was added to prevent the compiler
* complaining about missing pcx, pcxs and pcxt
* I'm assuming they have neither gsc nor runway */
break;
}
}
static struct resource central_bus = {
.name = "Central Bus",
.start = F_EXTEND(0xfff80000),
.end = F_EXTEND(0xfffaffff),
.flags = IORESOURCE_MEM,
};
static struct resource local_broadcast = {
.name = "Local Broadcast",
.start = F_EXTEND(0xfffb0000),
.end = F_EXTEND(0xfffdffff),
.flags = IORESOURCE_MEM,
};
static struct resource global_broadcast = {
.name = "Global Broadcast",
.start = F_EXTEND(0xfffe0000),
.end = F_EXTEND(0xffffffff),
.flags = IORESOURCE_MEM,
};
static int __init parisc_init_resources(void)
{
int result;
result = request_resource(&iomem_resource, &central_bus);
if (result < 0) {
printk(KERN_ERR
"%s: failed to claim %s address space!\n",
__FILE__, central_bus.name);
return result;
}
result = request_resource(&iomem_resource, &local_broadcast);
if (result < 0) {
printk(KERN_ERR
"%s: failed to claim %s address space!\n",
__FILE__, local_broadcast.name);
return result;
}
result = request_resource(&iomem_resource, &global_broadcast);
if (result < 0) {
printk(KERN_ERR
"%s: failed to claim %s address space!\n",
__FILE__, global_broadcast.name);
return result;
}
return 0;
}
extern void gsc_init(void);
extern void processor_init(void);
extern void ccio_init(void);
extern void hppb_init(void);
extern void dino_init(void);
extern void iosapic_init(void);
extern void lba_init(void);
extern void sba_init(void);
extern void eisa_init(void);
static int __init parisc_init(void)
{
u32 osid = (OS_ID_LINUX << 16);
parisc_proc_mkdir();
parisc_init_resources();
do_device_inventory(); /* probe for hardware */
parisc_pdc_chassis_init();
/* set up a new led state on systems shipped LED State panel */
pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
/* tell PDC we're Linux. Nevermind failure. */
pdc_stable_write(0x40, &osid, sizeof(osid));
/* start with known state */
flush_cache_all_local();
flush_tlb_all_local(NULL);
processor_init();
#ifdef CONFIG_SMP
pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
num_online_cpus(), num_present_cpus(),
#else
pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
#endif
boot_cpu_data.cpu_name,
boot_cpu_data.cpu_hz / 1000000,
boot_cpu_data.cpu_hz % 1000000 );
#if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
/* Don't serialize TLB flushes if we run on one CPU only. */
if (num_online_cpus() == 1)
pa_serialize_tlb_flushes = 0;
#endif
apply_alternatives_all();
parisc_setup_cache_timing();
/* These are in a non-obvious order, will fix when we have an iotree */
#if defined(CONFIG_IOSAPIC)
iosapic_init();
#endif
#if defined(CONFIG_IOMMU_SBA)
sba_init();
#endif
#if defined(CONFIG_PCI_LBA)
lba_init();
#endif
/* CCIO before any potential subdevices */
#if defined(CONFIG_IOMMU_CCIO)
ccio_init();
#endif
/*
* Need to register Asp & Wax before the EISA adapters for the IRQ
* regions. EISA must come before PCI to be sure it gets IRQ region
* 0.
*/
#if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
gsc_init();
#endif
#ifdef CONFIG_EISA
eisa_init();
#endif
#if defined(CONFIG_HPPB)
hppb_init();
#endif
#if defined(CONFIG_GSC_DINO)
dino_init();
#endif
#ifdef CONFIG_CHASSIS_LCD_LED
register_led_regions(); /* register LED port info in procfs */
#endif
return 0;
}
arch_initcall(parisc_init);
void __init start_parisc(void)
{
extern void early_trap_init(void);
int ret, cpunum;
struct pdc_coproc_cfg coproc_cfg;
/* check QEMU/SeaBIOS marker in PAGE0 */
running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
cpunum = smp_processor_id();
init_cpu_topology();
set_firmware_width_unlocked();
ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
if (ret >= 0 && coproc_cfg.ccr_functional) {
mtctl(coproc_cfg.ccr_functional, 10);
per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
asm volatile ("fstd %fr0,8(%sp)");
} else {
panic("must have an fpu to boot linux");
}
early_trap_init(); /* initialize checksum of fault_vector */
start_kernel();
// not reached
}
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