forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
352 lines
7.6 KiB
352 lines
7.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Copyright 2006-2008, IBM Corporation. |
|
*/ |
|
|
|
#undef DEBUG |
|
|
|
#include <linux/types.h> |
|
#include <linux/kernel.h> |
|
#include <linux/slab.h> |
|
#include <linux/smp.h> |
|
#include <linux/reboot.h> |
|
#include <linux/kexec.h> |
|
#include <linux/crash_dump.h> |
|
|
|
#include <asm/kexec.h> |
|
#include <asm/reg.h> |
|
#include <asm/io.h> |
|
#include <asm/prom.h> |
|
#include <asm/machdep.h> |
|
#include <asm/rtas.h> |
|
#include <asm/cell-regs.h> |
|
|
|
#include "ras.h" |
|
|
|
|
|
static void dump_fir(int cpu) |
|
{ |
|
struct cbe_pmd_regs __iomem *pregs = cbe_get_cpu_pmd_regs(cpu); |
|
struct cbe_iic_regs __iomem *iregs = cbe_get_cpu_iic_regs(cpu); |
|
|
|
if (pregs == NULL) |
|
return; |
|
|
|
/* Todo: do some nicer parsing of bits and based on them go down |
|
* to other sub-units FIRs and not only IIC |
|
*/ |
|
printk(KERN_ERR "Global Checkstop FIR : 0x%016llx\n", |
|
in_be64(&pregs->checkstop_fir)); |
|
printk(KERN_ERR "Global Recoverable FIR : 0x%016llx\n", |
|
in_be64(&pregs->checkstop_fir)); |
|
printk(KERN_ERR "Global MachineCheck FIR : 0x%016llx\n", |
|
in_be64(&pregs->spec_att_mchk_fir)); |
|
|
|
if (iregs == NULL) |
|
return; |
|
printk(KERN_ERR "IOC FIR : 0x%016llx\n", |
|
in_be64(&iregs->ioc_fir)); |
|
|
|
} |
|
|
|
DEFINE_INTERRUPT_HANDLER(cbe_system_error_exception) |
|
{ |
|
int cpu = smp_processor_id(); |
|
|
|
printk(KERN_ERR "System Error Interrupt on CPU %d !\n", cpu); |
|
dump_fir(cpu); |
|
dump_stack(); |
|
} |
|
|
|
DEFINE_INTERRUPT_HANDLER(cbe_maintenance_exception) |
|
{ |
|
int cpu = smp_processor_id(); |
|
|
|
/* |
|
* Nothing implemented for the maintenance interrupt at this point |
|
*/ |
|
|
|
printk(KERN_ERR "Unhandled Maintenance interrupt on CPU %d !\n", cpu); |
|
dump_stack(); |
|
} |
|
|
|
DEFINE_INTERRUPT_HANDLER(cbe_thermal_exception) |
|
{ |
|
int cpu = smp_processor_id(); |
|
|
|
/* |
|
* Nothing implemented for the thermal interrupt at this point |
|
*/ |
|
|
|
printk(KERN_ERR "Unhandled Thermal interrupt on CPU %d !\n", cpu); |
|
dump_stack(); |
|
} |
|
|
|
static int cbe_machine_check_handler(struct pt_regs *regs) |
|
{ |
|
int cpu = smp_processor_id(); |
|
|
|
printk(KERN_ERR "Machine Check Interrupt on CPU %d !\n", cpu); |
|
dump_fir(cpu); |
|
|
|
/* No recovery from this code now, lets continue */ |
|
return 0; |
|
} |
|
|
|
struct ptcal_area { |
|
struct list_head list; |
|
int nid; |
|
int order; |
|
struct page *pages; |
|
}; |
|
|
|
static LIST_HEAD(ptcal_list); |
|
|
|
static int ptcal_start_tok, ptcal_stop_tok; |
|
|
|
static int __init cbe_ptcal_enable_on_node(int nid, int order) |
|
{ |
|
struct ptcal_area *area; |
|
int ret = -ENOMEM; |
|
unsigned long addr; |
|
|
|
if (is_kdump_kernel()) |
|
rtas_call(ptcal_stop_tok, 1, 1, NULL, nid); |
|
|
|
area = kmalloc(sizeof(*area), GFP_KERNEL); |
|
if (!area) |
|
goto out_err; |
|
|
|
area->nid = nid; |
|
area->order = order; |
|
area->pages = __alloc_pages_node(area->nid, |
|
GFP_KERNEL|__GFP_THISNODE, |
|
area->order); |
|
|
|
if (!area->pages) { |
|
printk(KERN_WARNING "%s: no page on node %d\n", |
|
__func__, area->nid); |
|
goto out_free_area; |
|
} |
|
|
|
/* |
|
* We move the ptcal area to the middle of the allocated |
|
* page, in order to avoid prefetches in memcpy and similar |
|
* functions stepping on it. |
|
*/ |
|
addr = __pa(page_address(area->pages)) + (PAGE_SIZE >> 1); |
|
printk(KERN_DEBUG "%s: enabling PTCAL on node %d address=0x%016lx\n", |
|
__func__, area->nid, addr); |
|
|
|
ret = -EIO; |
|
if (rtas_call(ptcal_start_tok, 3, 1, NULL, area->nid, |
|
(unsigned int)(addr >> 32), |
|
(unsigned int)(addr & 0xffffffff))) { |
|
printk(KERN_ERR "%s: error enabling PTCAL on node %d!\n", |
|
__func__, nid); |
|
goto out_free_pages; |
|
} |
|
|
|
list_add(&area->list, &ptcal_list); |
|
|
|
return 0; |
|
|
|
out_free_pages: |
|
__free_pages(area->pages, area->order); |
|
out_free_area: |
|
kfree(area); |
|
out_err: |
|
return ret; |
|
} |
|
|
|
static int __init cbe_ptcal_enable(void) |
|
{ |
|
const u32 *size; |
|
struct device_node *np; |
|
int order, found_mic = 0; |
|
|
|
np = of_find_node_by_path("/rtas"); |
|
if (!np) |
|
return -ENODEV; |
|
|
|
size = of_get_property(np, "ibm,cbe-ptcal-size", NULL); |
|
if (!size) { |
|
of_node_put(np); |
|
return -ENODEV; |
|
} |
|
|
|
pr_debug("%s: enabling PTCAL, size = 0x%x\n", __func__, *size); |
|
order = get_order(*size); |
|
of_node_put(np); |
|
|
|
/* support for malta device trees, with be@/mic@ nodes */ |
|
for_each_node_by_type(np, "mic-tm") { |
|
cbe_ptcal_enable_on_node(of_node_to_nid(np), order); |
|
found_mic = 1; |
|
} |
|
|
|
if (found_mic) |
|
return 0; |
|
|
|
/* support for older device tree - use cpu nodes */ |
|
for_each_node_by_type(np, "cpu") { |
|
const u32 *nid = of_get_property(np, "node-id", NULL); |
|
if (!nid) { |
|
printk(KERN_ERR "%s: node %pOF is missing node-id?\n", |
|
__func__, np); |
|
continue; |
|
} |
|
cbe_ptcal_enable_on_node(*nid, order); |
|
found_mic = 1; |
|
} |
|
|
|
return found_mic ? 0 : -ENODEV; |
|
} |
|
|
|
static int cbe_ptcal_disable(void) |
|
{ |
|
struct ptcal_area *area, *tmp; |
|
int ret = 0; |
|
|
|
pr_debug("%s: disabling PTCAL\n", __func__); |
|
|
|
list_for_each_entry_safe(area, tmp, &ptcal_list, list) { |
|
/* disable ptcal on this node */ |
|
if (rtas_call(ptcal_stop_tok, 1, 1, NULL, area->nid)) { |
|
printk(KERN_ERR "%s: error disabling PTCAL " |
|
"on node %d!\n", __func__, |
|
area->nid); |
|
ret = -EIO; |
|
continue; |
|
} |
|
|
|
/* ensure we can access the PTCAL area */ |
|
memset(page_address(area->pages), 0, |
|
1 << (area->order + PAGE_SHIFT)); |
|
|
|
/* clean up */ |
|
list_del(&area->list); |
|
__free_pages(area->pages, area->order); |
|
kfree(area); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int cbe_ptcal_notify_reboot(struct notifier_block *nb, |
|
unsigned long code, void *data) |
|
{ |
|
return cbe_ptcal_disable(); |
|
} |
|
|
|
static void cbe_ptcal_crash_shutdown(void) |
|
{ |
|
cbe_ptcal_disable(); |
|
} |
|
|
|
static struct notifier_block cbe_ptcal_reboot_notifier = { |
|
.notifier_call = cbe_ptcal_notify_reboot |
|
}; |
|
|
|
#ifdef CONFIG_PPC_IBM_CELL_RESETBUTTON |
|
static int sysreset_hack; |
|
|
|
static int __init cbe_sysreset_init(void) |
|
{ |
|
struct cbe_pmd_regs __iomem *regs; |
|
|
|
sysreset_hack = of_machine_is_compatible("IBM,CBPLUS-1.0"); |
|
if (!sysreset_hack) |
|
return 0; |
|
|
|
regs = cbe_get_cpu_pmd_regs(0); |
|
if (!regs) |
|
return 0; |
|
|
|
/* Enable JTAG system-reset hack */ |
|
out_be32(®s->fir_mode_reg, |
|
in_be32(®s->fir_mode_reg) | |
|
CBE_PMD_FIR_MODE_M8); |
|
|
|
return 0; |
|
} |
|
device_initcall(cbe_sysreset_init); |
|
|
|
int cbe_sysreset_hack(void) |
|
{ |
|
struct cbe_pmd_regs __iomem *regs; |
|
|
|
/* |
|
* The BMC can inject user triggered system reset exceptions, |
|
* but cannot set the system reset reason in srr1, |
|
* so check an extra register here. |
|
*/ |
|
if (sysreset_hack && (smp_processor_id() == 0)) { |
|
regs = cbe_get_cpu_pmd_regs(0); |
|
if (!regs) |
|
return 0; |
|
if (in_be64(®s->ras_esc_0) & 0x0000ffff) { |
|
out_be64(®s->ras_esc_0, 0); |
|
return 0; |
|
} |
|
} |
|
return 1; |
|
} |
|
#endif /* CONFIG_PPC_IBM_CELL_RESETBUTTON */ |
|
|
|
static int __init cbe_ptcal_init(void) |
|
{ |
|
int ret; |
|
ptcal_start_tok = rtas_token("ibm,cbe-start-ptcal"); |
|
ptcal_stop_tok = rtas_token("ibm,cbe-stop-ptcal"); |
|
|
|
if (ptcal_start_tok == RTAS_UNKNOWN_SERVICE |
|
|| ptcal_stop_tok == RTAS_UNKNOWN_SERVICE) |
|
return -ENODEV; |
|
|
|
ret = register_reboot_notifier(&cbe_ptcal_reboot_notifier); |
|
if (ret) |
|
goto out1; |
|
|
|
ret = crash_shutdown_register(&cbe_ptcal_crash_shutdown); |
|
if (ret) |
|
goto out2; |
|
|
|
return cbe_ptcal_enable(); |
|
|
|
out2: |
|
unregister_reboot_notifier(&cbe_ptcal_reboot_notifier); |
|
out1: |
|
printk(KERN_ERR "Can't disable PTCAL, so not enabling\n"); |
|
return ret; |
|
} |
|
|
|
arch_initcall(cbe_ptcal_init); |
|
|
|
void __init cbe_ras_init(void) |
|
{ |
|
unsigned long hid0; |
|
|
|
/* |
|
* Enable System Error & thermal interrupts and wakeup conditions |
|
*/ |
|
|
|
hid0 = mfspr(SPRN_HID0); |
|
hid0 |= HID0_CBE_THERM_INT_EN | HID0_CBE_THERM_WAKEUP | |
|
HID0_CBE_SYSERR_INT_EN | HID0_CBE_SYSERR_WAKEUP; |
|
mtspr(SPRN_HID0, hid0); |
|
mb(); |
|
|
|
/* |
|
* Install machine check handler. Leave setting of precise mode to |
|
* what the firmware did for now |
|
*/ |
|
ppc_md.machine_check_exception = cbe_machine_check_handler; |
|
mb(); |
|
|
|
/* |
|
* For now, we assume that IOC_FIR is already set to forward some |
|
* error conditions to the System Error handler. If that is not true |
|
* then it will have to be fixed up here. |
|
*/ |
|
}
|
|
|