Use the module pointer to find the address we need to map to in the early
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
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=326525
@ -352,13 +352,13 @@ create_pagetables:
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/* Find the size of the kernel */
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mov x6, #(KERNBASE)
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ldr x7, .Lend
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/* Find the end - begin */
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sub x8, x7, x6
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/* Find modulep - begin */
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sub x8, x0, x6
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/* Add a 2MiB page for the module data and round up */
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ldr x7, =(2 * L2_SIZE - 1)
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add x8, x8, x7
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/* Get the number of l2 pages to allocate, rounded down */
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lsr x10, x8, #(L2_SHIFT)
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/* Add 8 MiB for any rounding above and the module data */
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add x10, x10, #4
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/* Create the kernel space L2 table */
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mov x6, x26
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