target/linux/brcm47xx/patches-2.6.25/800-fix_cfe_detection.patch

   1 --- a/arch/mips/bcm47xx/prom.c
   2 +++ b/arch/mips/bcm47xx/prom.c
   3 @@ -32,6 +32,7 @@
   4  #include <asm/fw/cfe/cfe_error.h>
   5
   6  static int cfe_cons_handle;
   7 +static void (* __prom_putchar)(char c);
   8
   9  const char *get_system_type(void)
  10  {
  11 @@ -40,65 +41,40 @@ const char *get_system_type(void)
  12
  13  void prom_putchar(char c)
  14  {
  15 +       if (__prom_putchar)
  16 +               __prom_putchar(c);
  17 +}
  18 +
  19 +void prom_putchar_cfe(char c)
  20 +{
  21         while (cfe_write(cfe_cons_handle, &c, 1) == 0)
  22                 ;
  23  }
  24
  25 -static __init void prom_init_cfe(void)
  26 +static __init int prom_init_cfe(void)
  27  {
  28         uint32_t cfe_ept;
  29         uint32_t cfe_handle;
  30         uint32_t cfe_eptseal;
  31 -       int argc = fw_arg0;
  32 -       char **envp = (char **) fw_arg2;
  33 -       int *prom_vec = (int *) fw_arg3;
  34 -
  35 -       /*
  36 -        * Check if a loader was used; if NOT, the 4 arguments are
  37 -        * what CFE gives us (handle, 0, EPT and EPTSEAL)
  38 -        */
  39 -       if (argc < 0) {
  40 -               cfe_handle = (uint32_t)argc;
  41 -               cfe_ept = (uint32_t)envp;
  42 -               cfe_eptseal = (uint32_t)prom_vec;
  43 -       } else {
  44 -               if ((int)prom_vec < 0) {
  45 -                       /*
  46 -                        * Old loader; all it gives us is the handle,
  47 -                        * so use the "known" entrypoint and assume
  48 -                        * the seal.
  49 -                        */
  50 -                       cfe_handle = (uint32_t)prom_vec;
  51 -                       cfe_ept = 0xBFC00500;
  52 -                       cfe_eptseal = CFE_EPTSEAL;
  53 -               } else {
  54 -                       /*
  55 -                        * Newer loaders bundle the handle/ept/eptseal
  56 -                        * Note: prom_vec is in the loader's useg
  57 -                        * which is still alive in the TLB.
  58 -                        */
  59 -                       cfe_handle = prom_vec[0];
  60 -                       cfe_ept = prom_vec[2];
  61 -                       cfe_eptseal = prom_vec[3];
  62 -               }
  63 -       }
  64
  65 -       if (cfe_eptseal != CFE_EPTSEAL) {
  66 -               /* too early for panic to do any good */
  67 -               printk(KERN_ERR "CFE's entrypoint seal doesn't match.");
  68 -               while (1) ;
  69 -       }
  70 +       cfe_eptseal = (uint32_t) fw_arg3;
  71 +       cfe_handle = (uint32_t) fw_arg0;
  72 +       cfe_ept = (uint32_t) fw_arg2;
  73 +
  74 +       if (cfe_eptseal != CFE_EPTSEAL)
  75 +               return -1;
  76
  77         cfe_init(cfe_handle, cfe_ept);
  78 +       return 0;
  79  }
  80
  81 -static __init void prom_init_console(void)
  82 +static __init void prom_init_console_cfe(void)
  83  {
  84         /* Initialize CFE console */
  85         cfe_cons_handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE);
  86  }
  87
  88 -static __init void prom_init_cmdline(void)
  89 +static __init void prom_init_cmdline_cfe(void)
  90  {
  91         char buf[CL_SIZE];
  92
  93 @@ -146,9 +122,12 @@ static __init void prom_init_mem(void)
  94
  95  void __init prom_init(void)
  96  {
  97 -       prom_init_cfe();
  98 -       prom_init_console();
  99 -       prom_init_cmdline();
 100 +       if (prom_init_cfe() == 0) {
 101 +               prom_init_console_cfe();
 102 +               prom_init_cmdline_cfe();
 103 +               __prom_putchar = prom_putchar_cfe;
 104 +       }
 105 +
 106         prom_init_mem();
 107  }
 108