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172 lines
6.0 KiB
172 lines
6.0 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 the new |
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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 reboot is |
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set. If so, grub will automatically boot the last booted kernel using the same |
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parameters |
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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 4d493ab7661..3a6689abb11 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 c4ebe9e22ad..70614de1565 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 25158407dd8..ad80399246a 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 73e2f464475..0a599607f31 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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