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177 lines
6.1 KiB
177 lines
6.1 KiB
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>
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Date: Thu, 20 Sep 2012 18:07:39 -0300
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Subject: [PATCH] IBM client architecture (CAS) reboot support
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This is an implementation of IBM client architecture (CAS) reboot for GRUB.
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There are cases where the POWER firmware must reboot in order to support
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specific features requested by a kernel. The kernel calls
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ibm,client-architecture-support and it may either return or reboot with
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the new feature set. eg:
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Calling ibm,client-architecture-support.../
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Elapsed time since release of system processors: 70959 mins 50 secs
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Welcome to GRUB!
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Instead of return to the GRUB menu, it will check if the flag for CAS
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reboot is set. If so, grub will automatically boot the last booted
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kernel using the same parameters
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Signed-off-by: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>
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[rharwood@redhat.com: commit message rewrap]
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Signed-off-by: Robbie Harwood <rharwood@redhat.com>
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---
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grub-core/kern/ieee1275/openfw.c | 63 ++++++++++++++++++++++++++++++++++++++++
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grub-core/normal/main.c | 19 ++++++++++++
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grub-core/script/execute.c | 7 +++++
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include/grub/ieee1275/ieee1275.h | 2 ++
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4 files changed, 91 insertions(+)
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diff --git a/grub-core/kern/ieee1275/openfw.c b/grub-core/kern/ieee1275/openfw.c
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index 4d493ab766..3a6689abb1 100644
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--- a/grub-core/kern/ieee1275/openfw.c
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+++ b/grub-core/kern/ieee1275/openfw.c
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@@ -591,3 +591,66 @@ grub_ieee1275_get_boot_dev (void)
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return bootpath;
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}
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+
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+/* Check if it's a CAS reboot. If so, set the script to be executed. */
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+int
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+grub_ieee1275_cas_reboot (char *script)
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+{
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+ grub_uint32_t ibm_ca_support_reboot;
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+ grub_uint32_t ibm_fw_nbr_reboots;
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+ char property_value[10];
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+ grub_ssize_t actual;
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+ grub_ieee1275_ihandle_t options;
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+
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+ if (grub_ieee1275_finddevice ("/options", &options) < 0)
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+ return -1;
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+
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+ /* Check two properties, one is enough to get cas reboot value */
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+ ibm_ca_support_reboot = 0;
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+ if (grub_ieee1275_get_integer_property (grub_ieee1275_chosen,
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+ "ibm,client-architecture-support-reboot",
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+ &ibm_ca_support_reboot,
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+ sizeof (ibm_ca_support_reboot),
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+ &actual) >= 0)
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+ grub_dprintf("ieee1275", "ibm,client-architecture-support-reboot: %u\n",
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+ ibm_ca_support_reboot);
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+
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+ ibm_fw_nbr_reboots = 0;
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+ if (grub_ieee1275_get_property (options, "ibm,fw-nbr-reboots",
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+ property_value, sizeof (property_value),
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+ &actual) >= 0)
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+ {
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+ property_value[sizeof (property_value) - 1] = 0;
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+ ibm_fw_nbr_reboots = (grub_uint8_t) grub_strtoul (property_value, 0, 10);
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+ grub_dprintf("ieee1275", "ibm,fw-nbr-reboots: %u\n", ibm_fw_nbr_reboots);
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+ }
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+
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+ if (ibm_ca_support_reboot || ibm_fw_nbr_reboots)
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+ {
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+ if (! grub_ieee1275_get_property_length (options, "boot-last-label", &actual))
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+ {
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+ if (actual > 1024)
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+ script = grub_realloc (script, actual + 1);
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+ grub_ieee1275_get_property (options, "boot-last-label", script, actual,
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+ &actual);
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+ return 0;
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+ }
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+ }
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+
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+ grub_ieee1275_set_boot_last_label ("");
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+
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+ return -1;
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+}
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+
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+int grub_ieee1275_set_boot_last_label (const char *text)
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+{
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+ grub_ieee1275_ihandle_t options;
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+ grub_ssize_t actual;
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+
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+ grub_dprintf("ieee1275", "set boot_last_label (size: %u)\n", grub_strlen(text));
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+ if (! grub_ieee1275_finddevice ("/options", &options) &&
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+ options != (grub_ieee1275_ihandle_t) -1)
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+ grub_ieee1275_set_property (options, "boot-last-label", text,
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+ grub_strlen (text), &actual);
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+ return 0;
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+}
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diff --git a/grub-core/normal/main.c b/grub-core/normal/main.c
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index c4ebe9e22a..70614de156 100644
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--- a/grub-core/normal/main.c
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+++ b/grub-core/normal/main.c
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@@ -34,6 +34,9 @@
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#include <grub/charset.h>
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#include <grub/script_sh.h>
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#include <grub/bufio.h>
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+#ifdef GRUB_MACHINE_IEEE1275
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+#include <grub/ieee1275/ieee1275.h>
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+#endif
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GRUB_MOD_LICENSE ("GPLv3+");
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@@ -276,6 +279,22 @@ grub_normal_execute (const char *config, int nested, int batch)
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{
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menu = read_config_file (config);
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+#ifdef GRUB_MACHINE_IEEE1275
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+ int boot;
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+ boot = 0;
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+ char *script;
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+ script = grub_malloc (1024);
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+ if (! grub_ieee1275_cas_reboot (script))
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+ {
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+ char *dummy[1] = { NULL };
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+ if (! grub_script_execute_sourcecode (script))
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+ boot = 1;
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+ }
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+ grub_free (script);
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+ if (boot)
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+ grub_command_execute ("boot", 0, 0);
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+#endif
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+
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/* Ignore any error. */
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grub_errno = GRUB_ERR_NONE;
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}
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diff --git a/grub-core/script/execute.c b/grub-core/script/execute.c
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index 25158407dd..ad80399246 100644
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--- a/grub-core/script/execute.c
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+++ b/grub-core/script/execute.c
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@@ -28,6 +28,9 @@
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#include <grub/extcmd.h>
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#include <grub/i18n.h>
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#include <grub/verify.h>
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+#ifdef GRUB_MACHINE_IEEE1275
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+#include <grub/ieee1275/ieee1275.h>
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+#endif
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/* Max digits for a char is 3 (0xFF is 255), similarly for an int it
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is sizeof (int) * 3, and one extra for a possible -ve sign. */
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@@ -883,6 +886,10 @@ grub_script_execute_sourcecode (const char *source)
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grub_err_t ret = 0;
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struct grub_script *parsed_script;
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+#ifdef GRUB_MACHINE_IEEE1275
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+ grub_ieee1275_set_boot_last_label (source);
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+#endif
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+
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while (source)
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{
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char *line;
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diff --git a/include/grub/ieee1275/ieee1275.h b/include/grub/ieee1275/ieee1275.h
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index 73e2f46447..0a599607f3 100644
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--- a/include/grub/ieee1275/ieee1275.h
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+++ b/include/grub/ieee1275/ieee1275.h
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@@ -254,6 +254,8 @@ int EXPORT_FUNC(grub_ieee1275_devalias_next) (struct grub_ieee1275_devalias *ali
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void EXPORT_FUNC(grub_ieee1275_children_peer) (struct grub_ieee1275_devalias *alias);
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void EXPORT_FUNC(grub_ieee1275_children_first) (const char *devpath,
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struct grub_ieee1275_devalias *alias);
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+int EXPORT_FUNC(grub_ieee1275_cas_reboot) (char *script);
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+int EXPORT_FUNC(grub_ieee1275_set_boot_last_label) (const char *text);
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char *EXPORT_FUNC(grub_ieee1275_get_boot_dev) (void);
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