d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Use the module pointer to find the address we need to map to in the early

Browse Source 
arm64 boot sequence. This will be a virtual address in the kernel space
after the kernel and any modules loaded by loader so we can use this to
find the size of the kernel + modules. We can then add on a level 2 page for
the module data and round up the size to be aligned to a level 2 page.

This allows more than 8 MiB of modules to be loaded by loader, e.g. zfs.ko
and opensolaris.ko.

Reported by:	Shawn Webb
MFC after:	1 week
Sponsored by:	DARPA, AFRL
This commit is contained in:
Andrew Turner 2017-12-04 11:25:34 +00:00
parent 5be9377857
commit 78f23de54c
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
sys/arm64/arm64/locore.S
View File

@ -352,13 +352,13 @@ create_pagetables:
/* Find the size of the kernel */
mov x6, #(KERNBASE)
ldr x7, .Lend
/* Find the end - begin */
sub x8, x7, x6
/* Find modulep - begin */
sub x8, x0, x6
/* Add a 2MiB page for the module data and round up */
ldr x7, =(2 * L2_SIZE - 1)
add x8, x8, x7
/* Get the number of l2 pages to allocate, rounded down */
lsr x10, x8, #(L2_SHIFT)
/* Add 8 MiB for any rounding above and the module data */
add x10, x10, #4
/* Create the kernel space L2 table */
mov x6, x26