提交 61e2390e 编写于 作者: M Michael Neuling 提交者: Benjamin Herrenschmidt

powerpc: Make load_hander handle upto 64k offset

If we change load_hander() to use an ori instead of addi, we can load handlers
upto 64k away provided we are still 64k aligned.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
上级 faab4dd2
......@@ -55,7 +55,8 @@
* word.
*/
#define LOAD_HANDLER(reg, label) \
addi reg,reg,(label)-_stext; /* virt addr of handler ... */
/* Handlers must be within 64K of kbase, which must be 64k aligned */ \
ori reg,reg,(label)-_stext; /* virt addr of handler ... */
/* Exception register prefixes */
#define EXC_HV H
......
......@@ -585,8 +585,8 @@ __end_interrupts:
* Code from here down to __end_handlers is invoked from the
* exception prologs above. Because the prologs assemble the
* addresses of these handlers using the LOAD_HANDLER macro,
* which uses an addi instruction, these handlers must be in
* the first 32k of the kernel image.
* which uses an ori instruction, these handlers must be in
* the first 64k of the kernel image.
*/
/*** Common interrupt handlers ***/
......
......@@ -601,6 +601,11 @@ void __init setup_arch(char **cmdline_p)
kvm_linear_init();
/* Interrupt code needs to be 64K-aligned */
if ((unsigned long)_stext & 0xffff)
panic("Kernelbase not 64K-aligned (0x%lx)!\n",
(unsigned long)_stext);
ppc64_boot_msg(0x15, "Setup Done");
}
......
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