2017-01-27 09:27:10 +00:00
|
|
|
#ifndef _ASM_E820_API_H
|
|
|
|
|
#define _ASM_E820_API_H
|
2008-05-14 15:15:40 +00:00
|
|
|
|
2017-01-27 08:58:02 +00:00
|
|
|
#include <asm/e820/types.h>
|
2016-12-05 17:49:13 +00:00
|
|
|
|
2017-01-27 12:54:38 +00:00
|
|
|
extern struct e820_table *e820_table;
|
2017-07-02 17:07:12 +00:00
|
|
|
extern struct e820_table *e820_table_kexec;
|
2017-07-02 17:07:32 +00:00
|
|
|
extern struct e820_table *e820_table_firmware;
|
2008-05-11 07:30:15 +00:00
|
|
|
|
2008-07-21 16:49:29 +00:00
|
|
|
extern unsigned long pci_mem_start;
|
2017-01-27 11:43:49 +00:00
|
|
|
|
2017-01-28 21:34:55 +00:00
|
|
|
extern bool e820__mapped_any(u64 start, u64 end, enum e820_type type);
|
|
|
|
|
extern bool e820__mapped_all(u64 start, u64 end, enum e820_type type);
|
x86/boot/e820: Create coherent API function names for E820 range operations
We have these three related functions:
extern void e820_add_region(u64 start, u64 size, int type);
extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type);
extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype);
But it's not clear from the naming that they are 3 operations based around the
same 'memory range' concept. Rename them to better signal this, and move
the prototypes next to each other:
extern void e820__range_add (u64 start, u64 size, int type);
extern u64 e820__range_update(u64 start, u64 size, unsigned old_type, unsigned new_type);
extern u64 e820__range_remove(u64 start, u64 size, unsigned old_type, int checktype);
Note that this improved organization of the functions shows another problem that was easy
to miss before: sometimes the E820 entry type is 'int', sometimes 'unsigned int' - but this
will be fixed in a separate patch.
No change in functionality.
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:19:36 +00:00
|
|
|
|
2017-01-28 15:52:34 +00:00
|
|
|
extern void e820__range_add (u64 start, u64 size, enum e820_type type);
|
|
|
|
|
extern u64 e820__range_update(u64 start, u64 size, enum e820_type old_type, enum e820_type new_type);
|
2017-01-28 21:34:55 +00:00
|
|
|
extern u64 e820__range_remove(u64 start, u64 size, enum e820_type old_type, bool check_type);
|
x86/boot/e820: Create coherent API function names for E820 range operations
We have these three related functions:
extern void e820_add_region(u64 start, u64 size, int type);
extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type);
extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, int checktype);
But it's not clear from the naming that they are 3 operations based around the
same 'memory range' concept. Rename them to better signal this, and move
the prototypes next to each other:
extern void e820__range_add (u64 start, u64 size, int type);
extern u64 e820__range_update(u64 start, u64 size, unsigned old_type, unsigned new_type);
extern u64 e820__range_remove(u64 start, u64 size, unsigned old_type, int checktype);
Note that this improved organization of the functions shows another problem that was easy
to miss before: sometimes the E820 entry type is 'int', sometimes 'unsigned int' - but this
will be fixed in a separate patch.
No change in functionality.
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 13:19:36 +00:00
|
|
|
|
2017-01-28 13:24:02 +00:00
|
|
|
extern void e820__print_table(char *who);
|
x86/boot/e820: Simplify the e820__update_table() interface
The e820__update_table() parameters are pretty complex:
arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_entry *biosmap, int max_nr_map, u32 *pnr_map);
But 90% of the usage is trivial:
arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries))
arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
arch/x86/kernel/e820.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
arch/x86/kernel/e820.c: if (e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries) < 0)
arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr);
arch/x86/kernel/early-quirks.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
arch/x86/kernel/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
arch/x86/platform/efi/efi.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries),
arch/x86/xen/setup.c: e820__update_table(e820_table->entries, ARRAY_SIZE(e820_table->entries), &e820_table->nr_entries);
arch/x86/xen/setup.c: e820__update_table(xen_e820_table.entries, ARRAY_SIZE(xen_e820_table.entries),
as it only uses an exiting struct e820_table's entries array, its size and
its current number of entries as input and output arguments.
Only one use is non-trivial:
arch/x86/kernel/e820.c: e820__update_table(boot_params.e820_table, ARRAY_SIZE(boot_params.e820_table), &new_nr);
... which call updates the E820 table in the zeropage in-situ, and the layout there does not
match that of 'struct e820_table' (in particular nr_entries is at a different offset,
hardcoded by the boot protocol).
Simplify all this by introducing a low level __e820__update_table() API that
the zeropage update call can use, and simplifying the main e820__update_table()
call signature down to:
int e820__update_table(struct e820_table *table);
This visibly simplifies all the call sites:
arch/x86/include/asm/e820/api.h:extern int e820__update_table(struct e820_table *table);
arch/x86/include/asm/e820/types.h: * call to e820__update_table() to remove duplicates. The allowance
arch/x86/kernel/e820.c: * The return value from e820__update_table() is zero if it
arch/x86/kernel/e820.c:int __init e820__update_table(struct e820_table *table)
arch/x86/kernel/e820.c: if (e820__update_table(e820_table))
arch/x86/kernel/e820.c: e820__update_table(e820_table_firmware);
arch/x86/kernel/e820.c: e820__update_table(e820_table);
arch/x86/kernel/e820.c: e820__update_table(e820_table);
arch/x86/kernel/e820.c: if (e820__update_table(e820_table) < 0)
arch/x86/kernel/early-quirks.c: e820__update_table(e820_table);
arch/x86/kernel/setup.c: e820__update_table(e820_table);
arch/x86/kernel/setup.c: e820__update_table(e820_table);
arch/x86/platform/efi/efi.c: e820__update_table(e820_table);
arch/x86/xen/setup.c: e820__update_table(&xen_e820_table);
arch/x86/xen/setup.c: e820__update_table(e820_table);
arch/x86/xen/setup.c: e820__update_table(&xen_e820_table);
No change in functionality.
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 17:00:35 +00:00
|
|
|
extern int e820__update_table(struct e820_table *table);
|
2017-01-28 13:03:04 +00:00
|
|
|
extern void e820__update_table_print(void);
|
2017-01-28 13:28:09 +00:00
|
|
|
|
2017-01-28 21:52:16 +00:00
|
|
|
extern unsigned long e820__end_of_ram_pfn(void);
|
|
|
|
|
extern unsigned long e820__end_of_low_ram_pfn(void);
|
2017-01-28 13:28:09 +00:00
|
|
|
|
2017-01-28 21:27:28 +00:00
|
|
|
extern u64 e820__memblock_alloc_reserved(u64 size, u64 align);
|
x86/boot/e820: Rename memblock_x86_fill() to e820__memblock_setup() and improve the explanations
So memblock_x86_fill() is another E820 code misnomer:
- nothing in its name tells us that it's part of the E820 subsystem ...
- The 'fill' wording is ambiguous and doesn't tell us whether it's a single
entry or some process - while the _real_ purpose of the function is hidden,
which is to do a complete setup of the (platform independent) memblock regions.
So rename it accordingly, to e820__memblock_setup().
Also translate this incomprehensible and misleading comment:
/*
* EFI may have more than 128 entries
* We are safe to enable resizing, beause memblock_x86_fill()
* is rather later for x86
*/
memblock_allow_resize();
The worst aspect of this comment isn't even the sloppy typos, but that it
casually mentions a '128' number with no explanation, which makes one lead
to the assumption that this is related to the well-known limit of a maximum
of 128 E820 entries passed via legacy bootloaders.
But no, the _real_ meaning of 128 here is that of the memblock subsystem,
which too happens to have a 128 entries limit for very early memblock
regions (which is unrelated to E820), via INIT_MEMBLOCK_REGIONS ...
So change the comment to a more comprehensible version:
/*
* The bootstrap memblock region count maximum is 128 entries
* (INIT_MEMBLOCK_REGIONS), but EFI might pass us more E820 entries
* than that - so allow memblock resizing.
*
* This is safe, because this call happens pretty late during x86 setup,
* so we know about reserved memory regions already. (This is important
* so that memblock resizing does no stomp over reserved areas.)
*/
memblock_allow_resize();
No change in functionality.
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 10:37:42 +00:00
|
|
|
extern void e820__memblock_setup(void);
|
2017-01-28 13:28:09 +00:00
|
|
|
|
2017-01-28 21:27:28 +00:00
|
|
|
extern void e820__reserve_setup_data(void);
|
2017-01-28 12:37:17 +00:00
|
|
|
extern void e820__finish_early_params(void);
|
2017-01-28 21:41:14 +00:00
|
|
|
extern void e820__reserve_resources(void);
|
|
|
|
|
extern void e820__reserve_resources_late(void);
|
2017-01-28 13:28:09 +00:00
|
|
|
|
2017-01-28 08:58:49 +00:00
|
|
|
extern void e820__memory_setup(void);
|
2017-01-28 13:28:09 +00:00
|
|
|
extern void e820__memory_setup_extended(u64 phys_addr, u32 data_len);
|
2017-01-28 08:58:49 +00:00
|
|
|
extern char *e820__memory_setup_default(void);
|
2017-01-28 13:28:09 +00:00
|
|
|
extern void e820__setup_pci_gap(void);
|
|
|
|
|
|
2017-01-28 21:52:16 +00:00
|
|
|
extern void e820__reallocate_tables(void);
|
2017-01-28 21:44:12 +00:00
|
|
|
extern void e820__register_nosave_regions(unsigned long limit_pfn);
|
2017-01-27 11:43:49 +00:00
|
|
|
|
2017-07-17 21:10:12 +00:00
|
|
|
extern int e820__get_entry_type(u64 start, u64 end);
|
|
|
|
|
|
2009-12-01 05:33:51 +00:00
|
|
|
/*
|
2017-01-27 11:43:49 +00:00
|
|
|
* Returns true iff the specified range [start,end) is completely contained inside
|
2009-12-01 05:33:51 +00:00
|
|
|
* the ISA region.
|
|
|
|
|
*/
|
2017-01-27 11:43:49 +00:00
|
|
|
static inline bool is_ISA_range(u64 start, u64 end)
|
2009-11-23 22:44:39 +00:00
|
|
|
{
|
2017-01-27 11:43:49 +00:00
|
|
|
return start >= ISA_START_ADDRESS && end <= ISA_END_ADDRESS;
|
2009-11-23 22:44:39 +00:00
|
|
|
}
|
2008-01-30 12:33:08 +00:00
|
|
|
|
2017-01-27 09:27:10 +00:00
|
|
|
#endif /* _ASM_E820_API_H */
|
