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PPC: machdep, zero BSS always but BookE

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Zero BSS always. The only case when this operation is
ommitted is when booting on BookE.

Created by:            Wojciech Macek <wma@semihalf.com>
Obtained from:         Semihalf
Reviewed by:           imp, nwhitehorn
Differential revision: https://reviews.freebsd.org/D13948
Sponsored by:          QCM Technologies
This commit is contained in:
Wojciech Macek 2018-01-18 07:41:04 +00:00
parent 5b3e8b0725
commit 8a0112ca65
1 changed files with 9 additions and 8 deletions
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17
sys/powerpc/powerpc/machdep.c
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@ -260,6 +260,15 @@ powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp,
if (mdp_cookie != 0xfb5d104d)
mdp = NULL;
#if !defined(BOOKE)
/*
* On BOOKE the BSS is already cleared and some variables
* initialized. Do not wipe them out.
*/
bzero(__sbss_start, __sbss_end - __sbss_start);
bzero(__bss_start, _end - __bss_start);
#endif
#ifdef AIM
/*
* If running from an FDT, make sure we are in real mode to avoid
@ -293,14 +302,6 @@ powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp,
#endif
}
} else {
#if !defined(BOOKE)
/*
* On BOOKE the BSS is already cleared and some variables
* initialized. Do not wipe them out.
*/
bzero(__sbss_start, __sbss_end - __sbss_start);
bzero(__bss_start, _end - __bss_start);
#endif
init_static_kenv(init_kenv, sizeof(init_kenv));
ofw_bootargs = true;
}