[OpenBIOS] [PATCH] More complete PowerPC OpenFirmware emulation -- adding bus-frequency

[Alexander von Gluck]

Below is a quick patch to introduce the bus-frequency field for each 
CPU.

This exists on every Apple OpenFirmware i've seen and is expected on 
Haiku OS.


The change to config/scripts/switch-arch isn't required but lets
you compile openbios using Haiku's PowerPC cross-compiler.


Also included is a extra tracing line for troubleshooting MMU issues.


Index: include/arch/common/fw_cfg.h
===================================================================
--- include/arch/common/fw_cfg.h	(revision 1046)
+++ include/arch/common/fw_cfg.h	(working copy)
@@ -41,9 +41,10 @@
  #define FW_CFG_PPC_DEPTH        (FW_CFG_ARCH_LOCAL + 0x02)
  #define FW_CFG_PPC_TBFREQ       (FW_CFG_ARCH_LOCAL + 0x03)
  #define FW_CFG_PPC_CPUFREQ      (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)
+#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)
+#define FW_CFG_PPC_BUSFREQ      (FW_CFG_ARCH_LOCAL + 0x08)

  #define FW_CFG_INVALID          0xffff

Index: config/scripts/switch-arch
===================================================================
--- config/scripts/switch-arch	(revision 1046)
+++ config/scripts/switch-arch	(working copy)
@@ -97,7 +97,7 @@

  select_prefix()
  {
-    for TARGET in ${1}-linux-gnu- ${1}-linux- ${1}-elf- ${1}-eabi-
+    for TARGET in ${1}-linux-gnu- ${1}-linux- ${1}-elf- ${1}-eabi- 
${1}-apple-haiku-
      do
          if type ${TARGET}gcc > /dev/null 2>&1
          then
Index: arch/ppc/qemu/init.c
===================================================================
--- arch/ppc/qemu/init.c	(revision 1046)
+++ arch/ppc/qemu/init.c	(working copy)
@@ -260,6 +260,11 @@
      push_str("clock-frequency");
      fword("property");

+    PUSH(fw_cfg_read_i32(FW_CFG_PPC_BUSFREQ));
+    fword("encode-int");
+    push_str("bus-frequency");
+    fword("property");
+
      push_str("running");
      fword("encode-string");
      push_str("state");
Index: drivers/iommu.c
===================================================================
--- drivers/iommu.c	(revision 1046)
+++ drivers/iommu.c	(working copy)
@@ -129,6 +129,7 @@
      /* Tremendous alignment causes great waste... */
      ptsize = (vasize / PAGE_SIZE) * sizeof(int);
      ret = ofmem_posix_memalign((void *)&ptab, ptsize, ptsize);
+    DPRINTF("Allocated IOMMU @ %p\n", (void *)&ptab);
      if (ret != 0) {
          DPRINTF("Cannot allocate IOMMU table [0x%x]\n", ptsize);
          for (;;) { }