adds 64bit mstatus
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7efa924510
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8e1951f298
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@ -172,6 +172,66 @@ public:
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return 0b00000000000000000001100010001000;
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}
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};
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// specialization 64bit
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template <typename T> class hart_state<T, typename std::enable_if<std::is_same<T, uint64_t>::value>::type> {
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public:
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BEGIN_BF_DECL(mstatus_t, T);
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// SD bit is read-only and is set when either the FS or XS bits encode a Dirty state (i.e., SD=((FS==11) OR XS==11)))
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BF_FIELD(SD, 63, 1);
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// value of XLEN for S-mode
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BF_FIELD(SXL, 34, 2);
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// value of XLEN for U-mode
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BF_FIELD(UXL, 32, 2);
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// Trap SRET
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BF_FIELD(TSR, 22, 1);
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// Timeout Wait
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BF_FIELD(TW, 21, 1);
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// Trap Virtual Memory
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BF_FIELD(TVM, 20, 1);
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// Make eXecutable Readable
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BF_FIELD(MXR, 19, 1);
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// permit Supervisor User Memory access
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BF_FIELD(SUM, 18, 1);
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// Modify PRiVilege
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BF_FIELD(MPRV, 17, 1);
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// status of additional user-mode extensions and associated state, All off/None dirty or clean, some on/None dirty, some clean/Some dirty
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BF_FIELD(XS, 15, 2);
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// floating-point unit status Off/Initial/Clean/Dirty
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BF_FIELD(FS, 13, 2);
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// machine previous privilege
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BF_FIELD(MPP, 11, 2);
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// supervisor previous privilege
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BF_FIELD(SPP, 8, 1);
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// previous machine interrupt-enable
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BF_FIELD(MPIE, 7, 1);
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// previous supervisor interrupt-enable
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BF_FIELD(SPIE, 5, 1);
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// previous user interrupt-enable
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BF_FIELD(UPIE, 4, 1);
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// machine interrupt-enable
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BF_FIELD(MIE, 3, 1);
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// supervisor interrupt-enable
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BF_FIELD(SIE, 1, 1);
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// user interrupt-enable
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BF_FIELD(UIE, 0, 1);
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END_BF_DECL();
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mstatus_t mstatus;
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static const reg_t mstatus_reset_val = 0xa00000000;
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void write_mstatus(T val) {
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auto mask = get_mask() &0xff; // MPP is hardcode as 0x3
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auto new_val = (mstatus.backing.val & ~mask) | (val & mask);
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mstatus = new_val;
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}
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static constexpr T get_mask() {
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return 0x8000000f007ff9ddULL; // 0b1...0 1111 0000 0000 0111 1111 1111 1001 1011 1011
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}
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};
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using hart_state_type = hart_state<reg_t>;
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constexpr reg_t get_irq_mask() {
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