diff mbox

[v2] PPC: Add clock-frequency export for Mac machines

Message ID 1371950649-53595-1-git-send-email-agraf@suse.de
State New
Headers show

Commit Message

Alexander Graf June 23, 2013, 1:24 a.m. UTC 
Support in fwcfg has been around for exposure of the clock-frequency
CPU property. OpenBIOS reads it, we just never exposed it.

Since Mac OS X is very picky about its clock frequency values, let's
just take a known good value and always expose that.

Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Alexander Graf <agraf@suse.de>

---

v1 -> v2:

  - rename fwcfg var to CLOCKFREQ to better reflect what it means
---
 hw/ppc/mac_newworld.c | 2 ++
 hw/ppc/mac_oldworld.c | 2 ++
 include/hw/ppc/ppc.h  | 1 +
 3 files changed, 5 insertions(+)
diff mbox

Patch

diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index d8e4db3..c6889d1 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -449,6 +449,8 @@  static void ppc_core99_init(QEMUMachineInitArgs *args)
     } else {
         fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_TBFREQ, get_ticks_per_sec());
     }
+    /* Mac OS X requires a "known good" clock-frequency value; pass it one. */
+    fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_CLOCKFREQ, 266000000);
 
     qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
 }
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 3acca94..8faff30 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -333,6 +333,8 @@  static void ppc_heathrow_init(QEMUMachineInitArgs *args)
     } else {
         fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_TBFREQ, get_ticks_per_sec());
     }
+    /* Mac OS X requires a "known good" clock-frequency value; pass it one. */
+    fw_cfg_add_i32(fw_cfg, FW_CFG_PPC_CLOCKFREQ, 266000000);
 
     qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
 }
diff --git a/include/hw/ppc/ppc.h b/include/hw/ppc/ppc.h
index acaf0d6..dfcad25 100644
--- a/include/hw/ppc/ppc.h
+++ b/include/hw/ppc/ppc.h
@@ -87,6 +87,7 @@  enum {
 #define FW_CFG_PPC_HEIGHT	(FW_CFG_ARCH_LOCAL + 0x01)
 #define FW_CFG_PPC_DEPTH	(FW_CFG_ARCH_LOCAL + 0x02)
 #define FW_CFG_PPC_TBFREQ	(FW_CFG_ARCH_LOCAL + 0x03)
+#define FW_CFG_PPC_CLOCKFREQ	(FW_CFG_ARCH_LOCAL + 0x04)
 #define FW_CFG_PPC_IS_KVM       (FW_CFG_ARCH_LOCAL + 0x05)
 #define FW_CFG_PPC_KVM_HC       (FW_CFG_ARCH_LOCAL + 0x06)
 #define FW_CFG_PPC_KVM_PID      (FW_CFG_ARCH_LOCAL + 0x07)