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-rw-r--r--arch/parisc/kernel/setup.c249
1 files changed, 79 insertions, 170 deletions
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 7349a3fedfc7..ace483b6f19a 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Initial setup-routines for HP 9000 based hardware.
*
@@ -9,21 +10,6 @@
* Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net>
*
* Initial PA-RISC Version: 04-23-1999 by Helge Deller
- *
- * 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, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * 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/kernel.h>
@@ -36,57 +22,65 @@
#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;
-
-#if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
-int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */
-EXPORT_SYMBOL(parisc_bus_is_phys);
-#endif
-
-void __init setup_cmdline(char **cmdline_p)
+static void __init setup_cmdline(char **cmdline_p)
{
extern unsigned int boot_args[];
+ char *p;
- /* Collect stuff passed in from the boot loader */
+ *cmdline_p = command_line;
/* 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 {
- strlcpy(boot_command_line, (char *)__va(boot_args[1]),
- COMMAND_LINE_SIZE);
+ if (boot_args[0] < 64)
+ return; /* return if called from hpux boot loader */
+
+ /* Collect stuff passed in from the boot loader */
+ 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
+ /* did palo pass us a ramdisk? */
+ if (boot_args[2] != 0) {
+ initrd_start = (unsigned long)__va(boot_args[2]);
+ initrd_end = (unsigned long)__va(boot_args[3]);
}
+#endif
- strcpy(command_line, boot_command_line);
- *cmdline_p = command_line;
+ strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
}
#ifdef CONFIG_PA11
-void __init dma_ops_init(void)
+static void __init dma_ops_init(void)
{
switch (boot_cpu_data.cpu_type) {
case pcx:
@@ -97,29 +91,15 @@ void __init dma_ops_init(void)
panic( "PA-RISC Linux currently only supports machines that conform to\n"
"the PA-RISC 1.1 or 2.0 architecture specification.\n");
- case pcxs:
- case pcxt:
- hppa_dma_ops = &pcx_dma_ops;
- break;
case pcxl2:
- pa7300lc_init();
- case pcxl: /* falls through */
- hppa_dma_ops = &pcxl_dma_ops;
- break;
default:
break;
}
}
#endif
-extern int init_per_cpu(int cpuid);
-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 */
@@ -130,9 +110,23 @@ void __init setup_arch(char **cmdline_p)
printk(KERN_INFO "The 32-bit Kernel has started...\n");
#endif
- printk(KERN_INFO "Default page size is %dKB.\n", (int)(PAGE_SIZE / 1024));
+ 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");
- pdc_console_init();
+ /*
+ * 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) {
@@ -146,27 +140,16 @@ void __init setup_arch(char **cmdline_p)
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
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con; /* we use do_take_over_console() later ! */
-#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)
{
@@ -197,48 +180,6 @@ const struct seq_operations cpuinfo_op = {
.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),
@@ -275,7 +216,7 @@ static int __init parisc_init_resources(void)
result = request_resource(&iomem_resource, &local_broadcast);
if (result < 0) {
printk(KERN_ERR
- "%s: failed to claim %saddress space!\n",
+ "%s: failed to claim %s address space!\n",
__FILE__, local_broadcast.name);
return result;
}
@@ -291,21 +232,10 @@ static int __init parisc_init_resources(void)
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 */
@@ -317,68 +247,45 @@ static int __init parisc_init(void)
/* 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();
- printk(KERN_INFO "CPU(s): %d x %s at %d.%06d MHz\n",
- num_present_cpus(),
+#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 );
- 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 */
+#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();
return 0;
}
arch_initcall(parisc_init);
-void start_parisc(void)
+void __init start_parisc(void)
{
- extern void start_kernel(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);
@@ -393,6 +300,8 @@ void start_parisc(void)
panic("must have an fpu to boot linux");
}
+ early_trap_init(); /* initialize checksum of fault_vector */
+
start_kernel();
// not reached
}
generated by cgit (git 2.34.1) at 2025-12-25 03:20:13 +0000