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target-alpha: Reduce internal processor registers for user-mode.

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The existing set of IPRs is totally irrelevant to user-mode emulation.
Indeed, they most are irrelevant to implementing kernel-mode emulation,
and would only be relevant to PAL-mode emulation, which I suspect that
no one will ever attempt.

Reducing the set of processor registers reduces the size of the CPU state.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-01-04 11:19:14 -08:00 • committed by Aurelien Jarno
parent 8443effb50
commit dad081ee69
3 changed files with 34 additions and 21 deletions
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6
target-alpha/cpu.h
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@ -193,6 +193,11 @@ enum {
/* Internal processor registers */
/* XXX: TOFIX: most of those registers are implementation dependant */
enum {
#if defined(CONFIG_USER_ONLY)
IPR_EXC_ADDR,
IPR_EXC_SUM,
IPR_EXC_MASK,
#else
/* Ebox IPRs */
IPR_CC = 0xC0, /* 21264 */
IPR_CC_CTL = 0xC1, /* 21264 */
@ -306,6 +311,7 @@ enum {
IPR_VPTB,
IPR_WHAMI,
IPR_ALT_MODE,
#endif
IPR_LAST,
};