runtime: rewrite isr() in Rust.

This commit is contained in:
whitequark 2016-10-07 06:27:10 +00:00
parent 8be60cc223
commit ef10344b3e
4 changed files with 138 additions and 16 deletions

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@ -1,8 +1,133 @@
#![allow(dead_code)]
use core::{cmp, ptr, str};
include!(concat!(env!("BUILDINC_DIRECTORY"), "/generated/mem.rs"));
include!(concat!(env!("BUILDINC_DIRECTORY"), "/generated/csr.rs"));
pub mod spr {
pub unsafe fn mfspr(reg: u32) -> u32 {
let value: u32;
asm!("l.mfspr $0, $1, 0" : "=r"(value) : "r"(reg) : : "volatile");
value
}
pub unsafe fn mtspr(reg: u32, value: u32) {
asm!("l.mtspr $0, $1, 0" : : "r"(reg), "r"(value) : : "volatile")
}
/* Definition of special-purpose registers (SPRs). */
pub const MAX_GRPS: u32 = 32;
pub const MAX_SPRS_PER_GRP_BITS: u32 = 11;
pub const MAX_SPRS_PER_GRP: u32 = 1 << MAX_SPRS_PER_GRP_BITS;
pub const MAX_SPRS: u32 = 0x10000;
/* Base addresses for the groups */
pub const SPRGROUP_SYS: u32 = 0 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_DMMU: u32 = 1 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_IMMU: u32 = 2 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_DC: u32 = 3 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_IC: u32 = 4 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_MAC: u32 = 5 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_D: u32 = 6 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_PC: u32 = 7 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_PM: u32 = 8 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_PIC: u32 = 9 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_TT: u32 = 10 << MAX_SPRS_PER_GRP_BITS;
pub const SPRGROUP_FP: u32 = 11 << MAX_SPRS_PER_GRP_BITS;
/* System control and status group */
pub const SPR_VR: u32 = SPRGROUP_SYS + 0;
pub const SPR_UPR: u32 = SPRGROUP_SYS + 1;
pub const SPR_CPUCFGR: u32 = SPRGROUP_SYS + 2;
pub const SPR_DMMUCFGR: u32 = SPRGROUP_SYS + 3;
pub const SPR_IMMUCFGR: u32 = SPRGROUP_SYS + 4;
pub const SPR_DCCFGR: u32 = SPRGROUP_SYS + 5;
pub const SPR_ICCFGR: u32 = SPRGROUP_SYS + 6;
pub const SPR_DCFGR: u32 = SPRGROUP_SYS + 7;
pub const SPR_PCCFGR: u32 = SPRGROUP_SYS + 8;
pub const SPR_VR2: u32 = SPRGROUP_SYS + 9;
pub const SPR_AVR: u32 = SPRGROUP_SYS + 10;
pub const SPR_EVBAR: u32 = SPRGROUP_SYS + 11;
pub const SPR_AECR: u32 = SPRGROUP_SYS + 12;
pub const SPR_AESR: u32 = SPRGROUP_SYS + 13;
pub const SPR_NPC: u32 = SPRGROUP_SYS + 16; /* CZ 21/06/01 */
pub const SPR_SR: u32 = SPRGROUP_SYS + 17; /* CZ 21/06/01 */
pub const SPR_PPC: u32 = SPRGROUP_SYS + 18; /* CZ 21/06/01 */
pub const SPR_FPCSR: u32 = SPRGROUP_SYS + 20; /* CZ 21/06/01 */
pub const SPR_ISR_BASE: u32 = SPRGROUP_SYS + 21;
pub const SPR_EPCR_BASE: u32 = SPRGROUP_SYS + 32; /* CZ 21/06/01 */
pub const SPR_EPCR_LAST: u32 = SPRGROUP_SYS + 47; /* CZ 21/06/01 */
pub const SPR_EEAR_BASE: u32 = SPRGROUP_SYS + 48;
pub const SPR_EEAR_LAST: u32 = SPRGROUP_SYS + 63;
pub const SPR_ESR_BASE: u32 = SPRGROUP_SYS + 64;
pub const SPR_ESR_LAST: u32 = SPRGROUP_SYS + 79;
pub const SPR_GPR_BASE: u32 = SPRGROUP_SYS + 1024;
// [snip]
/* PIC group */
pub const SPR_PICMR: u32 = SPRGROUP_PIC + 0;
pub const SPR_PICPR: u32 = SPRGROUP_PIC + 1;
pub const SPR_PICSR: u32 = SPRGROUP_PIC + 2;
// [snip]
/*
* Bit definitions for the Supervision Register
*
*/
pub const SPR_SR_SM: u32 = 0x00000001; /* Supervisor Mode */
pub const SPR_SR_TEE: u32 = 0x00000002; /* Tick timer Exception Enable */
pub const SPR_SR_IEE: u32 = 0x00000004; /* Interrupt Exception Enable */
pub const SPR_SR_DCE: u32 = 0x00000008; /* Data Cache Enable */
pub const SPR_SR_ICE: u32 = 0x00000010; /* Instruction Cache Enable */
pub const SPR_SR_DME: u32 = 0x00000020; /* Data MMU Enable */
pub const SPR_SR_IME: u32 = 0x00000040; /* Instruction MMU Enable */
pub const SPR_SR_LEE: u32 = 0x00000080; /* Little Endian Enable */
pub const SPR_SR_CE: u32 = 0x00000100; /* CID Enable */
pub const SPR_SR_F: u32 = 0x00000200; /* Condition Flag */
pub const SPR_SR_CY: u32 = 0x00000400; /* Carry flag */
pub const SPR_SR_OV: u32 = 0x00000800; /* Overflow flag */
pub const SPR_SR_OVE: u32 = 0x00001000; /* Overflow flag Exception */
pub const SPR_SR_DSX: u32 = 0x00002000; /* Delay Slot Exception */
pub const SPR_SR_EPH: u32 = 0x00004000; /* Exception Prefix High */
pub const SPR_SR_FO: u32 = 0x00008000; /* Fixed one */
pub const SPR_SR_SUMRA: u32 = 0x00010000; /* Supervisor SPR read access */
pub const SPR_SR_RES: u32 = 0x0ffe0000; /* Reserved */
pub const SPR_SR_CID: u32 = 0xf0000000; /* Context ID */
}
pub mod irq {
use super::spr::*;
pub fn get_ie() -> bool {
unsafe { mfspr(SPR_SR) & SPR_SR_IEE != 0 }
}
pub fn set_ie(ie: bool) {
if ie {
unsafe { mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_IEE) }
} else {
unsafe { mtspr(SPR_SR, mfspr(SPR_SR) & !SPR_SR_IEE) }
}
}
pub fn get_mask() -> u32 {
unsafe { mfspr(SPR_PICMR) }
}
pub fn set_mask(mask: u32) {
unsafe { mtspr(SPR_PICMR, mask) }
}
pub fn pending() -> u32 {
unsafe { mfspr(SPR_PICSR) }
}
}
extern {
pub fn flush_cpu_dcache();
pub fn flush_l2_cache();

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@ -1,5 +1,5 @@
#![no_std]
#![feature(libc, const_fn, try_borrow, stmt_expr_attributes, repr_simd)]
#![feature(libc, const_fn, try_borrow, stmt_expr_attributes, repr_simd, asm)]
#[macro_use]
extern crate std_artiq as std;
@ -70,6 +70,17 @@ pub unsafe extern fn rust_main() {
})
}
#[no_mangle]
pub unsafe extern fn isr() {
use board::{irq, csr};
extern { fn uart_isr(); }
let irqs = irq::pending() & irq::get_mask();
if irqs & (1 << csr::UART_INTERRUPT) != 0 {
uart_isr()
}
}
#[no_mangle]
pub fn sys_now() -> u32 {
clock::get_ms() as u32

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@ -3,7 +3,7 @@ include $(MISOC_DIRECTORY)/software/common.mak
PYTHON ?= python3.5
OBJECTS := isr.o flash_storage.o ksupport_data.o main.o
OBJECTS := flash_storage.o ksupport_data.o main.o
OBJECTS_KSUPPORT := ksupport.o artiq_personality.o mailbox.o \
rtio.o dds.o i2c.o

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@ -1,14 +0,0 @@
#include <generated/csr.h>
#include <irq.h>
#include <uart.h>
void isr(void);
void isr(void)
{
unsigned int irqs;
irqs = irq_pending() & irq_getmask();
if(irqs & (1 << UART_INTERRUPT))
uart_isr();
}