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ARM: keystone2: move update of the phys-to-virt constants into generic code

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Make the init_meminfo function return the offset to be applied to the
phys-to-virt translation constants.  This allows us to move the update
into generic code, along with the requirements for this update.

This avoids platforms having to know the details of the phys-to-virt
translation support.

Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Tested-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2015-04-04 09:53:38 +01:00
parent 30b5f4d612
commit c8ca2b4b29
3 changed files with 33 additions and 22 deletions
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27
arch/arm/mach-keystone/keystone.c
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@ -68,11 +68,9 @@ static phys_addr_t keystone_virt_to_idmap(unsigned long x)
return (phys_addr_t)(x) - CONFIG_PAGE_OFFSET + KEYSTONE_LOW_PHYS_START;
}
static void __init keystone_init_meminfo(void)
static long long __init keystone_init_meminfo(void)
{
bool lpae = IS_ENABLED(CONFIG_ARM_LPAE);
bool pvpatch = IS_ENABLED(CONFIG_ARM_PATCH_PHYS_VIRT);
phys_addr_t offset = PHYS_OFFSET - KEYSTONE_LOW_PHYS_START;
long long offset;
phys_addr_t mem_start, mem_end;
mem_start = memblock_start_of_DRAM();
@ -81,29 +79,24 @@ static void __init keystone_init_meminfo(void)
/* nothing to do if we are running out of the <32-bit space */
if (mem_start >= KEYSTONE_LOW_PHYS_START &&
mem_end <= KEYSTONE_LOW_PHYS_END)
return;
if (!lpae || !pvpatch) {
pr_crit("Enable %s%s%s to run outside 32-bit space\n",
!lpae ? __stringify(CONFIG_ARM_LPAE) : "",
(!lpae && !pvpatch) ? " and " : "",
!pvpatch ? __stringify(CONFIG_ARM_PATCH_PHYS_VIRT) : "");
}
return 0;
if (mem_start < KEYSTONE_HIGH_PHYS_START ||
mem_end > KEYSTONE_HIGH_PHYS_END) {
pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
(u64)mem_start, (u64)mem_end);
(u64)mem_start, (u64)mem_end);
return 0;
}
offset += KEYSTONE_HIGH_PHYS_START;
__pv_phys_pfn_offset = PFN_DOWN(offset);
__pv_offset = (offset - PAGE_OFFSET);
offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;
/* Populate the arch idmap hook */
arch_virt_to_idmap = keystone_virt_to_idmap;
pr_info("Switching to high address space at 0x%llx\n", (u64)offset);
pr_info("Switching to high address space at 0x%llx\n",
(u64)PHYS_OFFSET + (u64)offset);
return offset;
}
static const char *const keystone_match[] __initconst = {