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Diffstat (limited to 'contrib/syslinux/latest/core/fs/loadhigh.c')
-rw-r--r-- | contrib/syslinux/latest/core/fs/loadhigh.c | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/contrib/syslinux/latest/core/fs/loadhigh.c b/contrib/syslinux/latest/core/fs/loadhigh.c deleted file mode 100644 index bd9d353..0000000 --- a/contrib/syslinux/latest/core/fs/loadhigh.c +++ /dev/null @@ -1,112 +0,0 @@ -/* - * ----------------------------------------------------------------------- - * - * Copyright 1994-2009 H. Peter Anvin - All Rights Reserved - * Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, Inc., 53 Temple Place Ste 330, - * Boston MA 02111-1307, USA; either version 2 of the License, or - * (at your option) any later version; incorporated herein by reference. - * - * ----------------------------------------------------------------------- */ - -/* - * loadhigh.c - * - * An alternate interface to getfssec. - * - * Inputs: SI = file handle/cluster pointer - * EDI = target address in high memory - * EAX = maximum number of bytes to load - * DX = zero-padding mask (e.g. 0003h for pad to dword) - * BX = 16-bit subroutine to call at the top of each loop - * (to print status and check for abort) - * EBP = maximum load address - * - * Outputs: SI = file handle/cluster pointer - * EBX = first untouched address (not including padding) - * EDI = first untouched address (including padding) - * CF = reached EOF - * OF = ran out of high memory - */ - -#include <com32.h> -#include <minmax.h> -#include "core.h" -#include "fs.h" - -#define MAX_CHUNK (1 << 20) /* 1 MB */ - -void pm_load_high(com32sys_t *regs) -{ - struct fs_info *fs; - uint32_t bytes; - uint32_t zero_mask; - bool have_more; - uint32_t bytes_read; - char *buf, *limit; - struct file *file; - uint32_t sector_mask; - size_t pad; - uint32_t retflags = 0; - - bytes = regs->eax.l; - zero_mask = regs->edx.w[0]; - buf = (char *)regs->edi.l; - limit = (char *)(regs->ebp.l & ~zero_mask); - file = handle_to_file(regs->esi.w[0]); - fs = file->fs; - - sector_mask = SECTOR_SIZE(fs) - 1; - - while (bytes) { - uint32_t sectors; - uint32_t chunk; - - if (buf + SECTOR_SIZE(fs) > limit) { - /* Can't fit even one more sector in... */ - retflags = EFLAGS_OF; - break; - } - - chunk = bytes; - - if (regs->ebx.w[0]) { - call16((void (*)(void))(size_t)regs->ebx.w[0], &zero_regs, NULL); - chunk = min(chunk, MAX_CHUNK); - } - - if (chunk > (((char *)limit - buf) & ~sector_mask)) - chunk = ((char *)limit - buf) & ~sector_mask; - - sectors = (chunk + sector_mask) >> SECTOR_SHIFT(fs); - bytes_read = fs->fs_ops->getfssec(file, buf, sectors, &have_more); - - if (bytes_read > chunk) - bytes_read = chunk; - - buf += bytes_read; - bytes -= bytes_read; - - if (!have_more) { - /* - * If we reach EOF, the filesystem driver will have already closed - * the underlying file... this really should be cleaner. - */ - _close_file(file); - regs->esi.w[0] = 0; - retflags = EFLAGS_CF; - break; - } - } - - pad = (size_t)buf & zero_mask; - if (pad) - memset(buf, 0, pad); - - regs->ebx.l = (size_t)buf; - regs->edi.l = (size_t)buf + pad; - set_flags(regs, retflags); -} |