extern void hvc_opal_init_early(void);
+struct rtc_time;
+extern int opal_set_rtc_time(struct rtc_time *tm);
+extern void opal_get_rtc_time(struct rtc_time *tm);
+extern unsigned long opal_get_boot_time(void);
+extern void opal_nvram_init(void);
+
#endif /* __ASSEMBLY__ */
#endif /* __OPAL_H */
obj-y += setup.o opal-takeover.o opal-wrappers.o opal.o
+obj-y += opal-rtc.o opal-nvram.o
+
obj-$(CONFIG_SMP) += smp.o
--- /dev/null
+/*
+ * PowerNV nvram code.
+ *
+ * Copyright 2011 IBM Corp.
+ *
+ * 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.
+ */
+
+#define DEBUG
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/of.h>
+
+#include <asm/opal.h>
+#include <asm/machdep.h>
+
+static unsigned int nvram_size;
+
+static ssize_t opal_nvram_size(void)
+{
+ return nvram_size;
+}
+
+static ssize_t opal_nvram_read(char *buf, size_t count, loff_t *index)
+{
+ s64 rc;
+ int off;
+
+ if (*index >= nvram_size)
+ return 0;
+ off = *index;
+ if ((off + count) > nvram_size)
+ count = nvram_size - off;
+ rc = opal_read_nvram(__pa(buf), count, off);
+ if (rc != OPAL_SUCCESS)
+ return -EIO;
+ *index += count;
+ return count;
+}
+
+static ssize_t opal_nvram_write(char *buf, size_t count, loff_t *index)
+{
+ s64 rc = OPAL_BUSY;
+ int off;
+
+ if (*index >= nvram_size)
+ return 0;
+ off = *index;
+ if ((off + count) > nvram_size)
+ count = nvram_size - off;
+
+ while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
+ rc = opal_write_nvram(__pa(buf), count, off);
+ if (rc == OPAL_BUSY_EVENT)
+ opal_poll_events(NULL);
+ }
+ *index += count;
+ return count;
+}
+
+void __init opal_nvram_init(void)
+{
+ struct device_node *np;
+ const u32 *nbytes_p;
+
+ np = of_find_compatible_node(NULL, NULL, "ibm,opal-nvram");
+ if (np == NULL)
+ return;
+
+ nbytes_p = of_get_property(np, "#bytes", NULL);
+ if (!nbytes_p) {
+ of_node_put(np);
+ return;
+ }
+ nvram_size = *nbytes_p;
+
+ printk(KERN_INFO "OPAL nvram setup, %u bytes\n", nvram_size);
+ of_node_put(np);
+
+ ppc_md.nvram_read = opal_nvram_read;
+ ppc_md.nvram_write = opal_nvram_write;
+ ppc_md.nvram_size = opal_nvram_size;
+}
+
--- /dev/null
+/*
+ * PowerNV Real Time Clock.
+ *
+ * Copyright 2011 IBM Corp.
+ *
+ * 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.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+#include <linux/delay.h>
+
+#include <asm/opal.h>
+#include <asm/firmware.h>
+
+static void opal_to_tm(u32 y_m_d, u64 h_m_s_ms, struct rtc_time *tm)
+{
+ tm->tm_year = ((bcd2bin(y_m_d >> 24) * 100) +
+ bcd2bin((y_m_d >> 16) & 0xff)) - 1900;
+ tm->tm_mon = bcd2bin((y_m_d >> 8) & 0xff) - 1;
+ tm->tm_mday = bcd2bin(y_m_d & 0xff);
+ tm->tm_hour = bcd2bin((h_m_s_ms >> 56) & 0xff);
+ tm->tm_min = bcd2bin((h_m_s_ms >> 48) & 0xff);
+ tm->tm_sec = bcd2bin((h_m_s_ms >> 40) & 0xff);
+
+ GregorianDay(tm);
+}
+
+unsigned long __init opal_get_boot_time(void)
+{
+ struct rtc_time tm;
+ u32 y_m_d;
+ u64 h_m_s_ms;
+ long rc = OPAL_BUSY;
+
+ while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
+ rc = opal_rtc_read(&y_m_d, &h_m_s_ms);
+ if (rc == OPAL_BUSY_EVENT)
+ opal_poll_events(NULL);
+ else
+ mdelay(10);
+ }
+ if (rc != OPAL_SUCCESS)
+ return 0;
+ opal_to_tm(y_m_d, h_m_s_ms, &tm);
+ return mktime(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec);
+}
+
+void opal_get_rtc_time(struct rtc_time *tm)
+{
+ long rc = OPAL_BUSY;
+ u32 y_m_d;
+ u64 h_m_s_ms;
+
+ while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
+ rc = opal_rtc_read(&y_m_d, &h_m_s_ms);
+ if (rc == OPAL_BUSY_EVENT)
+ opal_poll_events(NULL);
+ else
+ mdelay(10);
+ }
+ if (rc != OPAL_SUCCESS)
+ return;
+ opal_to_tm(y_m_d, h_m_s_ms, tm);
+}
+
+int opal_set_rtc_time(struct rtc_time *tm)
+{
+ long rc = OPAL_BUSY;
+ u32 y_m_d = 0;
+ u64 h_m_s_ms = 0;
+
+ y_m_d |= ((u32)bin2bcd((tm->tm_year + 1900) / 100)) << 24;
+ y_m_d |= ((u32)bin2bcd((tm->tm_year + 1900) % 100)) << 16;
+ y_m_d |= ((u32)bin2bcd((tm->tm_mon + 1))) << 8;
+ y_m_d |= ((u32)bin2bcd(tm->tm_mday));
+
+ h_m_s_ms |= ((u64)bin2bcd(tm->tm_hour)) << 56;
+ h_m_s_ms |= ((u64)bin2bcd(tm->tm_min)) << 48;
+ h_m_s_ms |= ((u64)bin2bcd(tm->tm_sec)) << 40;
+
+ while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
+ rc = opal_rtc_write(y_m_d, h_m_s_ms);
+ if (rc == OPAL_BUSY_EVENT)
+ opal_poll_events(NULL);
+ else
+ mdelay(10);
+ }
+ return rc == OPAL_SUCCESS ? 0 : -EIO;
+}
#include <asm/machdep.h>
#include <asm/firmware.h>
#include <asm/xics.h>
+#include <asm/rtas.h>
#include <asm/opal.h>
+#include <asm/xics.h>
#include "powernv.h"
/* XXX PCI */
- /* XXX NVRAM */
+ /* Setup RTC and NVRAM callbacks */
+ if (firmware_has_feature(FW_FEATURE_OPAL))
+ opal_nvram_init();
/* Enable NAP mode */
powersave_nap = 1;
pnv_power_off();
}
-static unsigned long __init pnv_get_boot_time(void)
-{
- return 0;
-}
-
-static void pnv_get_rtc_time(struct rtc_time *rtc_tm)
+static void pnv_progress(char *s, unsigned short hex)
{
}
-static int pnv_set_rtc_time(struct rtc_time *tm)
+#ifdef CONFIG_KEXEC
+static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
{
- return 0;
+ xics_kexec_teardown_cpu(secondary);
}
+#endif /* CONFIG_KEXEC */
-static void pnv_progress(char *s, unsigned short hex)
+static void __init pnv_setup_machdep_opal(void)
{
+ ppc_md.get_boot_time = opal_get_boot_time;
+ ppc_md.get_rtc_time = opal_get_rtc_time;
+ ppc_md.set_rtc_time = opal_set_rtc_time;
+ ppc_md.restart = pnv_restart;
+ ppc_md.power_off = pnv_power_off;
+ ppc_md.halt = pnv_halt;
}
-#ifdef CONFIG_KEXEC
-static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
+#ifdef CONFIG_PPC_POWERNV_RTAS
+static void __init pnv_setup_machdep_rtas(void)
{
- xics_kexec_teardown_cpu(secondary);
+ if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
+ ppc_md.get_boot_time = rtas_get_boot_time;
+ ppc_md.get_rtc_time = rtas_get_rtc_time;
+ ppc_md.set_rtc_time = rtas_set_rtc_time;
+ }
+ ppc_md.restart = rtas_restart;
+ ppc_md.power_off = rtas_power_off;
+ ppc_md.halt = rtas_halt;
}
-#endif /* CONFIG_KEXEC */
+#endif /* CONFIG_PPC_POWERNV_RTAS */
static int __init pnv_probe(void)
{
hpte_init_native();
+ if (firmware_has_feature(FW_FEATURE_OPAL))
+ pnv_setup_machdep_opal();
+#ifdef CONFIG_PPC_POWERNV_RTAS
+ else if (rtas.base)
+ pnv_setup_machdep_rtas();
+#endif /* CONFIG_PPC_POWERNV_RTAS */
+
pr_debug("PowerNV detected !\n");
return 1;
define_machine(powernv) {
.name = "PowerNV",
.probe = pnv_probe,
- .setup_arch = pnv_setup_arch,
.init_early = pnv_init_early,
+ .setup_arch = pnv_setup_arch,
.init_IRQ = pnv_init_IRQ,
.show_cpuinfo = pnv_show_cpuinfo,
- .restart = pnv_restart,
- .power_off = pnv_power_off,
- .halt = pnv_halt,
- .get_boot_time = pnv_get_boot_time,
- .get_rtc_time = pnv_get_rtc_time,
- .set_rtc_time = pnv_set_rtc_time,
.progress = pnv_progress,
.power_save = power7_idle,
.calibrate_decr = generic_calibrate_decr,
projects / deliverable / linux.git / commitdiff
