mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 20:55:29 +07:00
bf495573fa
So the e820_table->map and e820_table->nr_map names are a bit confusing, because it's not clear what a 'map' really means (it could be a bitmap, or some other data structure), nor is it clear what nr_map means (is it a current index, or some other count). Rename the fields from: e820_table->map => e820_table->entries e820_table->nr_map => e820_table->nr_entries which makes it abundantly clear that these are entries of the table, and that the size of the table is ->nr_entries. Propagate the changes to all affected files. Where necessary, adjust local variable names to better reflect the new field names. 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>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include <linux/ioport.h>
|
|
#include <asm/e820/api.h>
|
|
|
|
static void resource_clip(struct resource *res, resource_size_t start,
|
|
resource_size_t end)
|
|
{
|
|
resource_size_t low = 0, high = 0;
|
|
|
|
if (res->end < start || res->start > end)
|
|
return; /* no conflict */
|
|
|
|
if (res->start < start)
|
|
low = start - res->start;
|
|
|
|
if (res->end > end)
|
|
high = res->end - end;
|
|
|
|
/* Keep the area above or below the conflict, whichever is larger */
|
|
if (low > high)
|
|
res->end = start - 1;
|
|
else
|
|
res->start = end + 1;
|
|
}
|
|
|
|
static void remove_e820_regions(struct resource *avail)
|
|
{
|
|
int i;
|
|
struct e820_entry *entry;
|
|
|
|
for (i = 0; i < e820_table->nr_entries; i++) {
|
|
entry = &e820_table->entries[i];
|
|
|
|
resource_clip(avail, entry->addr,
|
|
entry->addr + entry->size - 1);
|
|
}
|
|
}
|
|
|
|
void arch_remove_reservations(struct resource *avail)
|
|
{
|
|
/*
|
|
* Trim out BIOS area (high 2MB) and E820 regions. We do not remove
|
|
* the low 1MB unconditionally, as this area is needed for some ISA
|
|
* cards requiring a memory range, e.g. the i82365 PCMCIA controller.
|
|
*/
|
|
if (avail->flags & IORESOURCE_MEM) {
|
|
resource_clip(avail, BIOS_ROM_BASE, BIOS_ROM_END);
|
|
|
|
remove_e820_regions(avail);
|
|
}
|
|
}
|