lkml.org 
[lkml]   [2018]   [Oct]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 4/6] arm64: Utilize phys_initrd_start/phys_initrd_size
Date
ARM64 is the only architecture that re-defines
__early_init_dt_declare_initrd() in order for that function to populate
initrd_start/initrd_end with physical addresses instead of virtual
addresses. Instead of having an override we can leverage
drivers/of/fdt.c populating phys_initrd_start/phys_initrd_size to
populate those variables for us.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
arch/arm64/mm/init.c | 21 +++++++++------------
1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 3cf87341859f..e95cee656a55 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -72,8 +72,8 @@ static int __init early_initrd(char *p)
if (*endp == ',') {
size = memparse(endp + 1, NULL);

- initrd_start = start;
- initrd_end = start + size;
+ phys_initrd_start = start;
+ phys_initrd_size = size;
}
return 0;
}
@@ -408,14 +408,14 @@ void __init arm64_memblock_init(void)
memblock_add(__pa_symbol(_text), (u64)(_end - _text));
}

- if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && initrd_start) {
+ if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && phys_initrd_size) {
/*
* Add back the memory we just removed if it results in the
* initrd to become inaccessible via the linear mapping.
* Otherwise, this is a no-op
*/
- u64 base = initrd_start & PAGE_MASK;
- u64 size = PAGE_ALIGN(initrd_end) - base;
+ u64 base = phys_initrd_start & PAGE_MASK;
+ u64 size = PAGE_ALIGN(phys_initrd_size);

/*
* We can only add back the initrd memory if we don't end up
@@ -460,13 +460,10 @@ void __init arm64_memblock_init(void)
*/
memblock_reserve(__pa_symbol(_text), _end - _text);
#ifdef CONFIG_BLK_DEV_INITRD
- if (initrd_start) {
- memblock_reserve(initrd_start, initrd_end - initrd_start);
-
- /* the generic initrd code expects virtual addresses */
- initrd_start = __phys_to_virt(initrd_start);
- initrd_end = __phys_to_virt(initrd_end);
- }
+ /* the generic initrd code expects virtual addresses */
+ initrd_start = __phys_to_virt(phys_initrd_start);
+ initrd_end = initrd_start + phys_initrd_size;
+ initrd_below_start_ok = 0;
#endif

early_init_fdt_scan_reserved_mem();
--
2.17.1
\
 
 \ /
  Last update: 2018-10-31 00:08    [W:0.122 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site