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added some comments to help debuggers in the future
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@ -33,6 +33,8 @@ WRITE_READ_CSR mie, 0xFFF // Enable interrupts from all sources
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// Code copied from test library to cause m time interrupt, with time loop replaced with wfi.
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// Code copied from test library to cause m time interrupt, with time loop replaced with wfi.
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/* Note: the following line might cause problems in the future. If more than 0x50 cycles are needed before the wfi
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instruction begins, then the program might fall into a loop and run forever*/
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li x28, 0x50 // Desired offset from the present time
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li x28, 0x50 // Desired offset from the present time
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mv a3, x28 // copy value in to know to stop waiting for interrupt after this many cycles
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mv a3, x28 // copy value in to know to stop waiting for interrupt after this many cycles
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la x29, 0x02004000 // MTIMECMP register in CLINT
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la x29, 0x02004000 // MTIMECMP register in CLINT
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