MIPS: Add base architecture support for RI and XI.
Originally both Read Inhibit (RI) and Execute Inhibit (XI) were supported by the TLB only for a SmartMIPS core. The MIPSr3(TM) Architecture now defines an optional feature to implement these TLB bits separately. Support for one or both features can be checked by looking at the Config3.RXI bit. Signed-off-by: Steven J. Hill <sjhill@mips.com> Acked-by: David Daney <david.daney@cavium.com>
This commit is contained in:
parent
fea7a08acb
commit
b2ab4f08e8
|
@ -95,6 +95,9 @@
|
|||
#ifndef cpu_has_smartmips
|
||||
#define cpu_has_smartmips (cpu_data[0].ases & MIPS_ASE_SMARTMIPS)
|
||||
#endif
|
||||
#ifndef cpu_has_rixi
|
||||
#define cpu_has_rixi (cpu_data[0].options & MIPS_CPU_RIXI)
|
||||
#endif
|
||||
#ifndef kernel_uses_smartmips_rixi
|
||||
#define kernel_uses_smartmips_rixi 0
|
||||
#endif
|
||||
|
|
|
@ -319,6 +319,7 @@ enum cpu_type_enum {
|
|||
#define MIPS_CPU_VINT 0x00080000 /* CPU supports MIPSR2 vectored interrupts */
|
||||
#define MIPS_CPU_VEIC 0x00100000 /* CPU supports MIPSR2 external interrupt controller mode */
|
||||
#define MIPS_CPU_ULRI 0x00200000 /* CPU has ULRI feature */
|
||||
#define MIPS_CPU_RIXI 0x00400000 /* CPU has TLB Read/eXec Inhibit */
|
||||
|
||||
/*
|
||||
* CPU ASE encodings
|
||||
|
|
|
@ -590,6 +590,7 @@
|
|||
#define MIPS_CONF3_VEIC (_ULCAST_(1) << 6)
|
||||
#define MIPS_CONF3_LPA (_ULCAST_(1) << 7)
|
||||
#define MIPS_CONF3_DSP (_ULCAST_(1) << 10)
|
||||
#define MIPS_CONF3_RXI (_ULCAST_(1) << 12)
|
||||
#define MIPS_CONF3_ULRI (_ULCAST_(1) << 13)
|
||||
|
||||
#define MIPS_CONF4_MMUSIZEEXT (_ULCAST_(255) << 0)
|
||||
|
|
|
@ -421,8 +421,12 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c)
|
|||
|
||||
config3 = read_c0_config3();
|
||||
|
||||
if (config3 & MIPS_CONF3_SM)
|
||||
if (config3 & MIPS_CONF3_SM) {
|
||||
c->ases |= MIPS_ASE_SMARTMIPS;
|
||||
c->options |= MIPS_CPU_RIXI;
|
||||
}
|
||||
if (config3 & MIPS_CONF3_RXI)
|
||||
c->options |= MIPS_CPU_RIXI;
|
||||
if (config3 & MIPS_CONF3_DSP)
|
||||
c->ases |= MIPS_ASE_DSP;
|
||||
if (config3 & MIPS_CONF3_VINT)
|
||||
|
|
Loading…
Reference in New Issue