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For x86, read MAXPHYADDR, defined in SDM vol 3 4.1.4 Enumeration of Paging

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Features by CPUID as CPUID.80000008H:EAX[7:0], into variable cpu_maxphyaddr.

Reviewed by:	alc
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2015-01-12 07:36:25 +00:00
parent f104b614a0
commit b1752aa0ea
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=277047
5 changed files with 7 additions and 0 deletions
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1
sys/amd64/amd64/initcpu.c
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@ -78,6 +78,7 @@ u_int cpu_max_ext_state_size;
u_int cpu_mon_mwait_flags; /* MONITOR/MWAIT flags (CPUID.05H.ECX) */
u_int cpu_mon_min_size; /* MONITOR minimum range size, bytes */
u_int cpu_mon_max_size; /* MONITOR minimum range size, bytes */
u_int cpu_maxphyaddr; /* Max phys addr width in bits */
SYSCTL_UINT(_hw, OID_AUTO, via_feature_rng, CTLFLAG_RD,
&via_feature_rng, 0, "VIA RNG feature available in CPU");

1
sys/amd64/include/md_var.h
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@ -61,6 +61,7 @@ extern u_int cpu_vendor_id;
extern u_int cpu_mon_mwait_flags;
extern u_int cpu_mon_min_size;
extern u_int cpu_mon_max_size;
extern u_int cpu_maxphyaddr;
extern char ctx_switch_xsave[];
extern u_int hv_high;
extern char hv_vendor[];

1
sys/i386/i386/initcpu.c
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@ -107,6 +107,7 @@ u_int cpu_mon_mwait_flags; /* MONITOR/MWAIT flags (CPUID.05H.ECX) */
u_int cpu_mon_min_size; /* MONITOR minimum range size, bytes */
u_int cpu_mon_max_size; /* MONITOR minimum range size, bytes */
u_int cyrix_did; /* Device ID of Cyrix CPU */
u_int cpu_maxphyaddr; /* Max phys addr width in bits */
SYSCTL_UINT(_hw, OID_AUTO, via_feature_rng, CTLFLAG_RD,
&via_feature_rng, 0, "VIA RNG feature available in CPU");

1
sys/i386/include/md_var.h
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@ -61,6 +61,7 @@ extern u_int cpu_vendor_id;
extern u_int cpu_mon_mwait_flags;
extern u_int cpu_mon_min_size;
extern u_int cpu_mon_max_size;
extern u_int cpu_maxphyaddr;
extern u_int cyrix_did;
#if defined(I586_CPU) && !defined(NO_F00F_HACK)
extern int has_f00f_bug;

3
sys/x86/x86/identcpu.c
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@ -1393,7 +1393,10 @@ identify_cpu(void)
}
if (cpu_exthigh >= 0x80000008) {
do_cpuid(0x80000008, regs);
cpu_maxphyaddr = regs[0] & 0xff;
cpu_procinfo2 = regs[2];
} else {
cpu_maxphyaddr = (cpu_feature & CPUID_PAE) != 0 ? 36 : 32;
}
#ifdef __i386__