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sparc64: #blocks disk node method

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Return the number of blocks of storage associated with the device or
instance. Where a "block" is a unit of storage consisting of the number
of bytes returned by the package's "block-size" method. If the size cannot
be determined, the #blocks method returns the maximum unsigned integer
(which, because of Open Firmware's assumption of two's complement arithmetic,
is equivalent to the signed number -1). If the number of blocks exceeds
the range of an unsigned number, return 0 to alert the caller to try
the #blocks64 command.

Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Eric Snowberg 2018-02-26 17:34:19 -08:00 committed by Daniel Kiper
parent ad6d8f5063
commit ab4c93cb4b
2 changed files with 32 additions and 0 deletions
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31
grub-core/kern/sparc64/ieee1275/ieee1275.c
View file

@ -89,3 +89,34 @@ grub_ieee1275_alloc_physmem (grub_addr_t *paddr, grub_size_t size,
return args.catch_result;
}
grub_uint64_t
grub_ieee1275_num_blocks (grub_ieee1275_ihandle_t ihandle)
{
struct nblocks_args_ieee1275
{
struct grub_ieee1275_common_hdr common;
grub_ieee1275_cell_t method;
grub_ieee1275_cell_t ihandle;
grub_ieee1275_cell_t catch_result;
grub_ieee1275_cell_t blocks;
}
args;
INIT_IEEE1275_COMMON (&args.common, "call-method", 2, 2);
args.method = (grub_ieee1275_cell_t) "#blocks";
args.ihandle = ihandle;
args.catch_result = 1;
if ((IEEE1275_CALL_ENTRY_FN (&args) == -1) || (args.catch_result != 0))
return -1;
/*
* If the number of blocks exceeds the range of an unsigned number,
* return 0 to alert the caller to try the #blocks64 command.
*/
if (args.blocks >= 0xffffffffULL)
return 0;
return args.blocks;
}

1
include/grub/sparc64/ieee1275/ieee1275.h
View file

@ -42,6 +42,7 @@ extern int EXPORT_FUNC(grub_ieee1275_claim_vaddr) (grub_addr_t vaddr,
extern int EXPORT_FUNC(grub_ieee1275_alloc_physmem) (grub_addr_t *paddr,
grub_size_t size,
grub_uint32_t align);
extern grub_uint64_t EXPORT_FUNC(grub_ieee1275_num_blocks) (grub_uint32_t ihandle);
extern grub_addr_t EXPORT_VAR (grub_ieee1275_original_stack);