b2193b8ef2
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>
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/ieee1275/ieee1275.h>
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#include <grub/types.h>
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/* Sun specific ieee1275 interfaces used by GRUB. */
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int
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grub_ieee1275_claim_vaddr (grub_addr_t vaddr, grub_size_t size)
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{
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struct claim_vaddr_args
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{
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struct grub_ieee1275_common_hdr common;
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grub_ieee1275_cell_t method;
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grub_ieee1275_cell_t ihandle;
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grub_ieee1275_cell_t align;
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grub_ieee1275_cell_t size;
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grub_ieee1275_cell_t virt;
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grub_ieee1275_cell_t catch_result;
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}
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args;
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INIT_IEEE1275_COMMON (&args.common, "call-method", 5, 2);
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args.method = (grub_ieee1275_cell_t) "claim";
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args.ihandle = grub_ieee1275_mmu;
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args.align = 0;
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args.size = size;
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args.virt = vaddr;
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args.catch_result = (grub_ieee1275_cell_t) -1;
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if (IEEE1275_CALL_ENTRY_FN (&args) == -1)
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return -1;
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return args.catch_result;
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}
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int
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grub_ieee1275_alloc_physmem (grub_addr_t *paddr, grub_size_t size,
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grub_uint32_t align)
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{
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grub_uint32_t memory_ihandle;
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struct alloc_physmem_args
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{
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struct grub_ieee1275_common_hdr common;
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grub_ieee1275_cell_t method;
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grub_ieee1275_cell_t ihandle;
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grub_ieee1275_cell_t align;
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grub_ieee1275_cell_t size;
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grub_ieee1275_cell_t catch_result;
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grub_ieee1275_cell_t phys_high;
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grub_ieee1275_cell_t phys_low;
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}
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args;
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grub_ssize_t actual = 0;
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grub_ieee1275_get_property (grub_ieee1275_chosen, "memory",
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&memory_ihandle, sizeof (memory_ihandle),
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&actual);
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if (actual != sizeof (memory_ihandle))
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return -1;
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if (!align)
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align = 1;
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INIT_IEEE1275_COMMON (&args.common, "call-method", 4, 3);
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args.method = (grub_ieee1275_cell_t) "claim";
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args.ihandle = memory_ihandle;
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args.align = (align ? align : 1);
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args.size = size;
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if (IEEE1275_CALL_ENTRY_FN (&args) == -1)
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return -1;
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*paddr = args.phys_low;
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return args.catch_result;
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}
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grub_uint64_t
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grub_ieee1275_num_blocks (grub_ieee1275_ihandle_t ihandle)
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{
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struct nblocks_args_ieee1275
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{
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struct grub_ieee1275_common_hdr common;
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grub_ieee1275_cell_t method;
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grub_ieee1275_cell_t ihandle;
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grub_ieee1275_cell_t catch_result;
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grub_ieee1275_cell_t blocks;
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}
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args;
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INIT_IEEE1275_COMMON (&args.common, "call-method", 2, 2);
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args.method = (grub_ieee1275_cell_t) "#blocks";
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args.ihandle = ihandle;
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args.catch_result = 1;
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if ((IEEE1275_CALL_ENTRY_FN (&args) == -1) || (args.catch_result != 0))
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return -1;
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/*
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* If the number of blocks exceeds the range of an unsigned number,
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* return 0 to alert the caller to try the #blocks64 command.
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*/
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if (args.blocks >= 0xffffffffULL)
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return 0;
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return args.blocks;
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}
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