* kern/i386/linuxbios/init.c (grub_machine_init): Cast addr to
grub_addr_t before casting it to the void pointer to fix a
warning. Non-addressable regions are discarded earlier.
(grub_arch_modules_addr): Cast _end to grub_addr_t.
* kern/i386/linuxbios/table.c: Include grub/misc.h.
(check_signature): Don't shadow table_header.
(grub_linuxbios_table_iterate): Cast numeric constants to
grub_linuxbios_table_header_t.
* include/grub/i386/linuxbios/init.h: Add noreturn attribute to
grub_stop().
* include/grub/i386/linuxbios/memory.h
(GRUB_MEMORY_MACHINE_LINUXBIOS_TABLE_ADDR): Remove macro.
* kern/i386/linuxbios/table.c (grub_linuxbios_table_iterate): Do not
receive `table_header' as argument. Instead, probe for it in the
known memory ranges where it can be present.
(grub_available_iterate): Do not pass a fixed `table_header' address
to grub_linuxbios_table_iterate().
* include/grub/i386/efi/machine.h: New file.
* include/grub/i386/linuxbios/machine.h: Likewise.
* include/grub/i386/pc/machine.h: Likewise.
* include/grub/powerpc/ieee1275/machine.h: Likewise.
* include/grub/sparc64/ieee1275/machine.h: Likewise.
* term/i386/pc/serial.c: Include <grub/machine/machine.h>.
(serial_hw_io_addr): New variable.
(serial_hw_get_port): Obtain port address from `serial_hw_io_addr'
instead of `(unsigned short *) 0x400'.