Contributors: 34
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Paul Mackerras |
1459 |
68.27% |
14 |
11.20% |
| Benjamin Herrenschmidt |
271 |
12.68% |
19 |
15.20% |
| Linus Torvalds (pre-git) |
151 |
7.07% |
39 |
31.20% |
| Stephen Rothwell |
65 |
3.04% |
3 |
2.40% |
| Linus Torvalds |
27 |
1.26% |
5 |
4.00% |
| Daniel Axtens |
19 |
0.89% |
3 |
2.40% |
| Chen Lifu |
15 |
0.70% |
1 |
0.80% |
| Julia Lawall |
14 |
0.66% |
1 |
0.80% |
| Rob Herring |
13 |
0.61% |
5 |
4.00% |
| Andrew Morton |
13 |
0.61% |
4 |
3.20% |
| Olaf Hering |
11 |
0.51% |
2 |
1.60% |
| Anton Blanchard |
9 |
0.42% |
4 |
3.20% |
| Marc Zyngier |
7 |
0.33% |
1 |
0.80% |
| Grant C. Likely |
6 |
0.28% |
1 |
0.80% |
| Jeremy Kerr |
5 |
0.23% |
1 |
0.80% |
| Oliver O'Halloran |
5 |
0.23% |
1 |
0.80% |
| Jon Loeliger |
5 |
0.23% |
1 |
0.80% |
| David Woodhouse |
4 |
0.19% |
1 |
0.80% |
| Alexander Graf |
4 |
0.19% |
1 |
0.80% |
| Alon Bar-Lev |
3 |
0.14% |
1 |
0.80% |
| Nick Child |
3 |
0.14% |
2 |
1.60% |
| Olof Johansson |
3 |
0.14% |
1 |
0.80% |
| Christoph Hellwig |
3 |
0.14% |
2 |
1.60% |
| Al Viro |
3 |
0.14% |
1 |
0.80% |
| Tom Rini |
3 |
0.14% |
1 |
0.80% |
| Michael Ellerman |
3 |
0.14% |
2 |
1.60% |
| Paul Gortmaker |
3 |
0.14% |
1 |
0.80% |
| Thomas Gleixner |
2 |
0.09% |
1 |
0.80% |
| Mathieu Malaterre |
2 |
0.09% |
1 |
0.80% |
| Fabian Frederick |
2 |
0.09% |
1 |
0.80% |
| Kumar Gala |
1 |
0.05% |
1 |
0.80% |
| Christophe Leroy |
1 |
0.05% |
1 |
0.80% |
| Arnd Bergmann |
1 |
0.05% |
1 |
0.80% |
| Finn Thain |
1 |
0.05% |
1 |
0.80% |
| Total |
2137 |
|
125 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Powermac setup and early boot code plus other random bits.
*
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Adapted for Power Macintosh by Paul Mackerras
* Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
*
* Derived from "arch/alpha/kernel/setup.c"
* Copyright (C) 1995 Linus Torvalds
*
* Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
*/
/*
* bootup setup stuff..
*/
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/export.h>
#include <linux/user.h>
#include <linux/tty.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <linux/pci.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/bitops.h>
#include <linux/suspend.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <asm/reg.h>
#include <asm/sections.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include <asm/ohare.h>
#include <asm/mediabay.h>
#include <asm/machdep.h>
#include <asm/dma.h>
#include <asm/cputable.h>
#include <asm/btext.h>
#include <asm/pmac_feature.h>
#include <asm/time.h>
#include <asm/mmu_context.h>
#include <asm/iommu.h>
#include <asm/smu.h>
#include <asm/pmc.h>
#include <asm/udbg.h>
#include "pmac.h"
#undef SHOW_GATWICK_IRQS
static int has_l2cache;
int pmac_newworld;
static int current_root_goodness = -1;
/* sda1 - slightly silly choice */
#define DEFAULT_ROOT_DEVICE MKDEV(SCSI_DISK0_MAJOR, 1)
sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
EXPORT_SYMBOL(sys_ctrler);
static void pmac_show_cpuinfo(struct seq_file *m)
{
struct device_node *np;
const char *pp;
int plen;
int mbmodel;
unsigned int mbflags;
char* mbname;
mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
PMAC_MB_INFO_MODEL, 0);
mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
PMAC_MB_INFO_FLAGS, 0);
if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
(long) &mbname) != 0)
mbname = "Unknown";
/* find motherboard type */
seq_printf(m, "machine\t\t: ");
np = of_find_node_by_path("/");
if (np != NULL) {
pp = of_get_property(np, "model", NULL);
if (pp != NULL)
seq_printf(m, "%s\n", pp);
else
seq_printf(m, "PowerMac\n");
pp = of_get_property(np, "compatible", &plen);
if (pp != NULL) {
seq_printf(m, "motherboard\t:");
while (plen > 0) {
int l = strlen(pp) + 1;
seq_printf(m, " %s", pp);
plen -= l;
pp += l;
}
seq_printf(m, "\n");
}
of_node_put(np);
} else
seq_printf(m, "PowerMac\n");
/* print parsed model */
seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
seq_printf(m, "pmac flags\t: %08x\n", mbflags);
/* find l2 cache info */
np = of_find_node_by_name(NULL, "l2-cache");
if (np == NULL)
np = of_find_node_by_type(NULL, "cache");
if (np != NULL) {
const unsigned int *ic =
of_get_property(np, "i-cache-size", NULL);
const unsigned int *dc =
of_get_property(np, "d-cache-size", NULL);
seq_printf(m, "L2 cache\t:");
has_l2cache = 1;
if (of_property_read_bool(np, "cache-unified") && dc) {
seq_printf(m, " %dK unified", *dc / 1024);
} else {
if (ic)
seq_printf(m, " %dK instruction", *ic / 1024);
if (dc)
seq_printf(m, "%s %dK data",
(ic? " +": ""), *dc / 1024);
}
pp = of_get_property(np, "ram-type", NULL);
if (pp)
seq_printf(m, " %s", pp);
seq_printf(m, "\n");
of_node_put(np);
}
/* Indicate newworld/oldworld */
seq_printf(m, "pmac-generation\t: %s\n",
pmac_newworld ? "NewWorld" : "OldWorld");
}
#ifndef CONFIG_ADB_CUDA
int __init find_via_cuda(void)
{
struct device_node *dn = of_find_node_by_name(NULL, "via-cuda");
if (!dn)
return 0;
of_node_put(dn);
printk("WARNING ! Your machine is CUDA-based but your kernel\n");
printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
return 0;
}
#endif
#ifndef CONFIG_ADB_PMU
int __init find_via_pmu(void)
{
struct device_node *dn = of_find_node_by_name(NULL, "via-pmu");
if (!dn)
return 0;
of_node_put(dn);
printk("WARNING ! Your machine is PMU-based but your kernel\n");
printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
return 0;
}
#endif
#ifndef CONFIG_PMAC_SMU
int __init smu_init(void)
{
/* should check and warn if SMU is present */
return 0;
}
#endif
#ifdef CONFIG_PPC32
static volatile u32 *sysctrl_regs;
static void __init ohare_init(void)
{
struct device_node *dn;
/* this area has the CPU identification register
and some registers used by smp boards */
sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
/*
* Turn on the L2 cache.
* We assume that we have a PSX memory controller iff
* we have an ohare I/O controller.
*/
dn = of_find_node_by_name(NULL, "ohare");
if (dn) {
of_node_put(dn);
if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
if (sysctrl_regs[4] & 0x10)
sysctrl_regs[4] |= 0x04000020;
else
sysctrl_regs[4] |= 0x04000000;
if(has_l2cache)
printk(KERN_INFO "Level 2 cache enabled\n");
}
}
}
static void __init l2cr_init(void)
{
/* Checks "l2cr-value" property in the registry */
if (cpu_has_feature(CPU_FTR_L2CR)) {
struct device_node *np;
for_each_of_cpu_node(np) {
const unsigned int *l2cr =
of_get_property(np, "l2cr-value", NULL);
if (l2cr) {
_set_L2CR(0);
_set_L2CR(*l2cr);
pr_info("L2CR overridden (0x%x), backside cache is %s\n",
*l2cr, ((*l2cr) & 0x80000000) ?
"enabled" : "disabled");
}
of_node_put(np);
break;
}
}
}
#endif
static void __init pmac_setup_arch(void)
{
struct device_node *cpu, *ic;
const int *fp;
unsigned long pvr;
pvr = PVR_VER(mfspr(SPRN_PVR));
/* Set loops_per_jiffy to a half-way reasonable value,
for use until calibrate_delay gets called. */
loops_per_jiffy = 50000000 / HZ;
for_each_of_cpu_node(cpu) {
fp = of_get_property(cpu, "clock-frequency", NULL);
if (fp != NULL) {
if (pvr >= 0x30 && pvr < 0x80)
/* PPC970 etc. */
loops_per_jiffy = *fp / (3 * HZ);
else if (pvr == 4 || pvr >= 8)
/* 604, G3, G4 etc. */
loops_per_jiffy = *fp / HZ;
else
/* 603, etc. */
loops_per_jiffy = *fp / (2 * HZ);
of_node_put(cpu);
break;
}
}
/* See if newworld or oldworld */
ic = of_find_node_with_property(NULL, "interrupt-controller");
if (ic) {
pmac_newworld = 1;
of_node_put(ic);
}
#ifdef CONFIG_PPC32
ohare_init();
l2cr_init();
#endif /* CONFIG_PPC32 */
find_via_cuda();
find_via_pmu();
smu_init();
#if IS_ENABLED(CONFIG_NVRAM)
pmac_nvram_init();
#endif
#ifdef CONFIG_PPC32
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
ROOT_DEV = DEFAULT_ROOT_DEVICE;
#endif
#ifdef CONFIG_ADB
if (strstr(boot_command_line, "adb_sync")) {
extern int __adb_probe_sync;
__adb_probe_sync = 1;
}
#endif /* CONFIG_ADB */
}
static int initializing = 1;
static int pmac_late_init(void)
{
initializing = 0;
return 0;
}
machine_late_initcall(powermac, pmac_late_init);
void note_bootable_part(dev_t dev, int part, int goodness);
/*
* This is __ref because we check for "initializing" before
* touching any of the __init sensitive things and "initializing"
* will be false after __init time. This can't be __init because it
* can be called whenever a disk is first accessed.
*/
void __ref note_bootable_part(dev_t dev, int part, int goodness)
{
char *p;
if (!initializing)
return;
if ((goodness <= current_root_goodness) &&
ROOT_DEV != DEFAULT_ROOT_DEVICE)
return;
p = strstr(boot_command_line, "root=");
if (p != NULL && (p == boot_command_line || p[-1] == ' '))
return;
ROOT_DEV = dev + part;
current_root_goodness = goodness;
}
#ifdef CONFIG_ADB_CUDA
static void __noreturn cuda_restart(void)
{
struct adb_request req;
cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
for (;;)
cuda_poll();
}
static void __noreturn cuda_shutdown(void)
{
struct adb_request req;
cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
for (;;)
cuda_poll();
}
#else
#define cuda_restart()
#define cuda_shutdown()
#endif
#ifndef CONFIG_ADB_PMU
#define pmu_restart()
#define pmu_shutdown()
#endif
#ifndef CONFIG_PMAC_SMU
#define smu_restart()
#define smu_shutdown()
#endif
static void __noreturn pmac_restart(char *cmd)
{
switch (sys_ctrler) {
case SYS_CTRLER_CUDA:
cuda_restart();
break;
case SYS_CTRLER_PMU:
pmu_restart();
break;
case SYS_CTRLER_SMU:
smu_restart();
break;
default: ;
}
while (1) ;
}
static void __noreturn pmac_power_off(void)
{
switch (sys_ctrler) {
case SYS_CTRLER_CUDA:
cuda_shutdown();
break;
case SYS_CTRLER_PMU:
pmu_shutdown();
break;
case SYS_CTRLER_SMU:
smu_shutdown();
break;
default: ;
}
while (1) ;
}
static void __noreturn
pmac_halt(void)
{
pmac_power_off();
}
/*
* Early initialization.
*/
static void __init pmac_init(void)
{
/* Enable early btext debug if requested */
if (strstr(boot_command_line, "btextdbg")) {
udbg_adb_init_early();
register_early_udbg_console();
}
/* Probe motherboard chipset */
pmac_feature_init();
/* Initialize debug stuff */
udbg_scc_init(!!strstr(boot_command_line, "sccdbg"));
udbg_adb_init(!!strstr(boot_command_line, "btextdbg"));
#ifdef CONFIG_PPC64
iommu_init_early_dart(&pmac_pci_controller_ops);
#endif
/* SMP Init has to be done early as we need to patch up
* cpu_possible_mask before interrupt stacks are allocated
* or kaboom...
*/
#ifdef CONFIG_SMP
pmac_setup_smp();
#endif
}
static int __init pmac_declare_of_platform_devices(void)
{
struct device_node *np;
np = of_find_node_by_name(NULL, "valkyrie");
if (np) {
of_platform_device_create(np, "valkyrie", NULL);
of_node_put(np);
}
np = of_find_node_by_name(NULL, "platinum");
if (np) {
of_platform_device_create(np, "platinum", NULL);
of_node_put(np);
}
np = of_find_node_by_type(NULL, "smu");
if (np) {
of_platform_device_create(np, "smu", NULL);
of_node_put(np);
}
np = of_find_node_by_type(NULL, "fcu");
if (np == NULL) {
/* Some machines have strangely broken device-tree */
np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
}
if (np) {
of_platform_device_create(np, "temperature", NULL);
of_node_put(np);
}
return 0;
}
machine_device_initcall(powermac, pmac_declare_of_platform_devices);
#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
/*
* This is called very early, as part of console_init() (typically just after
* time_init()). This function is respondible for trying to find a good
* default console on serial ports. It tries to match the open firmware
* default output with one of the available serial console drivers.
*/
static int __init check_pmac_serial_console(void)
{
struct device_node *prom_stdout = NULL;
int offset = 0;
const char *name;
#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
char *devname = "ttyS";
#else
char *devname = "ttyPZ";
#endif
pr_debug(" -> check_pmac_serial_console()\n");
/* The user has requested a console so this is already set up. */
if (strstr(boot_command_line, "console=")) {
pr_debug(" console was specified !\n");
return -EBUSY;
}
if (!of_chosen) {
pr_debug(" of_chosen is NULL !\n");
return -ENODEV;
}
/* We are getting a weird phandle from OF ... */
/* ... So use the full path instead */
name = of_get_property(of_chosen, "linux,stdout-path", NULL);
if (name == NULL) {
pr_debug(" no linux,stdout-path !\n");
return -ENODEV;
}
prom_stdout = of_find_node_by_path(name);
if (!prom_stdout) {
pr_debug(" can't find stdout package %s !\n", name);
return -ENODEV;
}
pr_debug("stdout is %pOF\n", prom_stdout);
if (of_node_name_eq(prom_stdout, "ch-a"))
offset = 0;
else if (of_node_name_eq(prom_stdout, "ch-b"))
offset = 1;
else
goto not_found;
of_node_put(prom_stdout);
pr_debug("Found serial console at %s%d\n", devname, offset);
return add_preferred_console(devname, offset, NULL);
not_found:
pr_debug("No preferred console found !\n");
of_node_put(prom_stdout);
return -ENODEV;
}
console_initcall(check_pmac_serial_console);
#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init pmac_probe(void)
{
if (!of_machine_is_compatible("Power Macintosh") &&
!of_machine_is_compatible("MacRISC"))
return 0;
#ifdef CONFIG_PPC32
/* isa_io_base gets set in pmac_pci_init */
DMA_MODE_READ = 1;
DMA_MODE_WRITE = 2;
#endif /* CONFIG_PPC32 */
pm_power_off = pmac_power_off;
pmac_init();
return 1;
}
define_machine(powermac) {
.name = "PowerMac",
.probe = pmac_probe,
.setup_arch = pmac_setup_arch,
.discover_phbs = pmac_pci_init,
.show_cpuinfo = pmac_show_cpuinfo,
.init_IRQ = pmac_pic_init,
.get_irq = NULL, /* changed later */
.pci_irq_fixup = pmac_pci_irq_fixup,
.restart = pmac_restart,
.halt = pmac_halt,
.time_init = pmac_time_init,
.get_boot_time = pmac_get_boot_time,
.set_rtc_time = pmac_set_rtc_time,
.get_rtc_time = pmac_get_rtc_time,
.calibrate_decr = pmac_calibrate_decr,
.feature_call = pmac_do_feature_call,
.progress = udbg_progress,
#ifdef CONFIG_PPC64
.power_save = power4_idle,
.enable_pmcs = power4_enable_pmcs,
#endif /* CONFIG_PPC64 */
#ifdef CONFIG_PPC32
.pcibios_after_init = pmac_pcibios_after_init,
.phys_mem_access_prot = pci_phys_mem_access_prot,
#endif
};