35 |
/* OpenFirmware entry point passed to us from the real bootloader. */ |
/* OpenFirmware entry point passed to us from the real bootloader. */ |
36 |
intptr_t (*grub_ieee1275_entry_fn) (void *); |
intptr_t (*grub_ieee1275_entry_fn) (void *); |
37 |
|
|
38 |
|
grub_uint32_t grub_ieee1275_flags; |
39 |
|
|
40 |
|
|
41 |
/* Return a help text for this architecture. */ |
/* Return a help text for this architecture. */ |
42 |
const char * |
const char * |
50 |
/* Setup the argument vector and pass control over to the main |
/* Setup the argument vector and pass control over to the main |
51 |
function. */ |
function. */ |
52 |
void |
void |
53 |
cmain (uint32_t firmware_entry) |
cmain (uint32_t r3, uint32_t r4 __attribute__((unused)), uint32_t r5) |
54 |
{ |
{ |
55 |
char **argv, args[256]; |
char **argv, args[256]; |
56 |
grub_ieee1275_phandle_t chosen; |
grub_ieee1275_phandle_t chosen; |
57 |
int argc = 0, actual; |
int argc = 0, actual; |
58 |
long batl, batu; |
long batl, batu; |
59 |
|
|
60 |
grub_ieee1275_entry_fn = (intptr_t (*)(void *)) firmware_entry; |
if (r5 == 0xdeadbeef) |
61 |
|
{ |
62 |
|
/* Entered from Old World stage1. */ |
63 |
|
extern char _start; |
64 |
|
extern char _end; |
65 |
|
|
66 |
|
grub_ieee1275_entry_fn = (intptr_t (*)(void *)) r3; |
67 |
|
|
68 |
|
grub_ieee1275_flags = GRUB_IEEE1275_NO_PARTITION_0; |
69 |
|
|
70 |
|
/* Old World Open Firmware may use 4M-5M without claiming it. */ |
71 |
|
grub_ieee1275_claim (0x00400000, 0x00100000, 0, 0); |
72 |
|
|
73 |
|
/* Need to claim ourselves so we don't cannibalize our memory later. */ |
74 |
|
if (grub_ieee1275_claim ((grub_addr_t) &_start, (grub_addr_t) &_end |
75 |
|
- (grub_addr_t) &_start, 0, 0)) |
76 |
|
abort(); |
77 |
|
} |
78 |
|
else |
79 |
|
{ |
80 |
|
/* Assume we were entered from Open Firmware. */ |
81 |
|
grub_ieee1275_entry_fn = (intptr_t (*)(void *)) r5; |
82 |
|
} |
83 |
|
|
84 |
/* Initialize BAT registers to unmapped to not generate overlapping |
/* Initialize BAT registers to unmapped to not generate overlapping |
85 |
mappings below. */ |
mappings below. */ |