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xen: add hook for AP bootstrap memory reservation

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This hook will only be implemented for bare metal, Xen doesn't require
any bootstrap code since APs are started in long mode with paging
enabled.

Approved by: gibbs
Sponsored by: Citrix Systems R&D

amd64/amd64/machdep.c:
 - Set mp_bootaddress hook for bare metal.

x86/include/init.h:
 - Define mp_bootaddress in init_ops.
This commit is contained in:
Roger Pau Monné 2014-03-11 10:26:16 +00:00
parent 3d80242f23
commit 5a036d7e02
2 changed files with 12 additions and 4 deletions
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15
sys/amd64/amd64/machdep.c
View File

@ -178,6 +178,9 @@ struct init_ops init_ops = {
.early_clock_source_init = i8254_init,
.early_delay = i8254_delay,
.parse_memmap = native_parse_memmap,
#ifdef SMP
.mp_bootaddress = mp_bootaddress,
#endif
};
/*
@ -1490,10 +1493,14 @@ getmemsize(caddr_t kmdp, u_int64_t first)
if (basemem == 0)
panic("BIOS smap did not include a basemem segment!");
#ifdef SMP
/* make hole for AP bootstrap code */
physmap[1] = mp_bootaddress(physmap[1] / 1024);
#endif
/*
* Make hole for "AP -> long mode" bootstrap code. The
* mp_bootaddress vector is only available when the kernel
* is configured to support APs and APs for the system start
* in 32bit mode (e.g. SMP bare metal).
*/
if (init_ops.mp_bootaddress)
physmap[1] = init_ops.mp_bootaddress(physmap[1] / 1024);
/*
* Maxmem isn't the "maximum memory", it's one larger than the

1
sys/x86/include/init.h
View File

@ -39,6 +39,7 @@ struct init_ops {
void (*early_clock_source_init)(void);
void (*early_delay)(int);
void (*parse_memmap)(caddr_t, vm_paddr_t *, int *);
u_int (*mp_bootaddress)(u_int);
};
extern struct init_ops init_ops;