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[/] [potato/] [tags/] [v0.1/] [benchmarks/] [potato.h] - Rev 53
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// The Potato Processor // (c) Kristian Klomsten Skordal 2015 <kristian.skordal@wafflemail.net> // Report bugs and issues on <http://opencores.org/project,potato,bugtracker> #ifndef POTATO_H #define POTATO_H // This file contains various defines neccessary for using the Potato processor // with current RISC-V compilers. It also makes sure that applications keep // working even though the supervisor extension specification should change. // Control and status registers: #define CSR_SUP0 0x500 #define CSR_SUP1 0x501 #define CSR_EPC 0x502 #define CSR_BADVADDR 0x503 #define CSR_EVEC 0x508 #define CSR_CAUSE 0x509 #define CSR_STATUS 0x50a #define CSR_HARTID 0x50b #define CSR_TOHOST 0x51e #define CSR_FROMHOST 0x51f #define CSR_CYCLE 0xc00 #define CSR_CYCLEH 0xc80 #define CSR_TIME 0xc01 #define CSR_TIMEH 0xc81 #define CSR_INSTRET 0xc02 #define CSR_INSTRETH 0xc82 // Exception cause values: #define CAUSE_INSTR_MISALIGN 0x00 #define CAUSE_INSTR_FETCH 0x01 #define CAUSE_INVALID_INSTR 0x02 #define CAUSE_SYSCALL 0x06 #define CAUSE_BREAKPOINT 0x07 #define CAUSE_LOAD_MISALIGN 0x08 #define CAUSE_STORE_MISALIGN 0x09 #define CAUSE_LOAD_ERROR 0x0a #define CAUSE_STORE_ERROR 0x0b #define CAUSE_FROMHOST 0x1e #define CAUSE_IRQ_BASE 0x10 // Status register bit indices: #define STATUS_EI 2 // Enable Interrupts #define STATUS_PEI 3 // Previous value of Enable Interrupts #define STATUS_IM_MASK 0x00ff0000 // Interrupt Mask #define STATUS_PIM_MASK 0xff000000 // Previous Interrupt Mask #define potato_enable_interrupts() asm volatile("csrsi %[status], 1 << %[ei_bit]\n" \ :: [status] "i" (CSR_STATUS), [ei_bit] "i" (STATUS_EI)) #define potato_disable_interrupts() asm volatile("csrci %[status], 1 << %[ei_bit] | 1 << %[pei_bit]\n" \ :: [status] "i" (CSR_STATUS), [ei_bit] "i" (STATUS_EI), [pei_bit] "i" (STATUS_PEI)) #define potato_write_host(data) \ do { \ register uint32_t temp = data; \ asm volatile("csrw %[tohost], %[temp]\n" \ :: [tohost] "i" (CSR_TOHOST), [temp] "r" (temp)); \ } while(0); #define potato_enable_irq(n) \ do { \ register uint32_t temp = 0; \ asm volatile( \ "li %[temp], 1 << %[shift]\n" \ "csrs %[status], %[temp]\n" \ :: [temp] "r" (temp), [shift] "i" (n + 16), [status] "i" (CSR_STATUS)); \ } while(0) #define potato_disable_irq(n) \ do { \ register uint32_t temp = 0; \ asm volatile( \ "li %[temp], 1 << %[shift]\n" \ "csrc %[status], %[temp]\n" \ :: [temp] "r" (temp), [shift] "i" (n + 24), [status] "i" (CSR_STATUS)); \ } while(0) #define potato_get_badvaddr(n) \ do { \ register uint32_t __temp = 0; \ asm volatile ( \ "csrr %[temp], %[badvaddr]\n" \ : [temp] "=r" (__temp) : [badvaddr] "i" (CSR_BADVADDR)); \ n = __temp; \ } while(0) #endif
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