/*
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* Read/Write Loongson Extension Registers
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*/
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#ifndef _LOONGSON_REGS_H_
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#define _LOONGSON_REGS_H_
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#include <linux/types.h>
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#include <linux/bits.h>
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#include <asm/mipsregs.h>
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#include <asm/cpu.h>
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static inline bool cpu_has_cfg(void)
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{
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return ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64G);
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}
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static inline u32 read_cpucfg(u32 reg)
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{
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u32 __res;
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__asm__ __volatile__(
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"parse_r __res,%0\n\t"
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"parse_r reg,%1\n\t"
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".insn \n\t"
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".word (0xc8080118 | (reg << 21) | (__res << 11))\n\t"
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:"=r"(__res)
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:"r"(reg)
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:
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);
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return __res;
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}
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/* Bit Domains for CFG registers */
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#define LOONGSON_CFG0 0x0
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#define LOONGSON_CFG0_PRID GENMASK(31, 0)
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#define LOONGSON_CFG1 0x1
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#define LOONGSON_CFG1_FP BIT(0)
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#define LOONGSON_CFG1_FPREV GENMASK(3, 1)
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#define LOONGSON_CFG1_MMI BIT(4)
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#define LOONGSON_CFG1_MSA1 BIT(5)
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#define LOONGSON_CFG1_MSA2 BIT(6)
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#define LOONGSON_CFG1_CGP BIT(7)
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#define LOONGSON_CFG1_WRP BIT(8)
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#define LOONGSON_CFG1_LSX1 BIT(9)
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#define LOONGSON_CFG1_LSX2 BIT(10)
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#define LOONGSON_CFG1_LASX BIT(11)
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#define LOONGSON_CFG1_R6FXP BIT(12)
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#define LOONGSON_CFG1_R6CRCP BIT(13)
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#define LOONGSON_CFG1_R6FPP BIT(14)
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#define LOONGSON_CFG1_CNT64 BIT(15)
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#define LOONGSON_CFG1_LSLDR0 BIT(16)
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#define LOONGSON_CFG1_LSPREF BIT(17)
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#define LOONGSON_CFG1_LSPREFX BIT(18)
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#define LOONGSON_CFG1_LSSYNCI BIT(19)
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#define LOONGSON_CFG1_LSUCA BIT(20)
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#define LOONGSON_CFG1_LLSYNC BIT(21)
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#define LOONGSON_CFG1_TGTSYNC BIT(22)
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#define LOONGSON_CFG1_LLEXC BIT(23)
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#define LOONGSON_CFG1_SCRAND BIT(24)
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#define LOONGSON_CFG1_MUALP BIT(25)
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#define LOONGSON_CFG1_KMUALEN BIT(26)
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#define LOONGSON_CFG1_ITLBT BIT(27)
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#define LOONGSON_CFG1_LSUPERF BIT(28)
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#define LOONGSON_CFG1_SFBP BIT(29)
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#define LOONGSON_CFG1_CDMAP BIT(30)
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#define LOONGSON_CFG1_FPREV_OFFSET 1
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#define LOONGSON_CFG2 0x2
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#define LOONGSON_CFG2_LEXT1 BIT(0)
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#define LOONGSON_CFG2_LEXT2 BIT(1)
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#define LOONGSON_CFG2_LEXT3 BIT(2)
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#define LOONGSON_CFG2_LSPW BIT(3)
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#define LOONGSON_CFG2_LBT1 BIT(4)
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#define LOONGSON_CFG2_LBT2 BIT(5)
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#define LOONGSON_CFG2_LBT3 BIT(6)
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#define LOONGSON_CFG2_LBTMMU BIT(7)
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#define LOONGSON_CFG2_LPMP BIT(8)
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#define LOONGSON_CFG2_LPMREV GENMASK(11, 9)
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#define LOONGSON_CFG2_LAMO BIT(12)
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#define LOONGSON_CFG2_LPIXU BIT(13)
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#define LOONGSON_CFG2_LPIXNU BIT(14)
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#define LOONGSON_CFG2_LVZP BIT(15)
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#define LOONGSON_CFG2_LVZREV GENMASK(18, 16)
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#define LOONGSON_CFG2_LGFTP BIT(19)
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#define LOONGSON_CFG2_LGFTPREV GENMASK(22, 20)
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#define LOONGSON_CFG2_LLFTP BIT(23)
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#define LOONGSON_CFG2_LLFTPREV GENMASK(26, 24)
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#define LOONGSON_CFG2_LCSRP BIT(27)
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#define LOONGSON_CFG2_LDISBLIKELY BIT(28)
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#define LOONGSON_CFG2_LPMREV_OFFSET 9
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#define LOONGSON_CFG2_LPM_REV1 (1 << LOONGSON_CFG2_LPMREV_OFFSET)
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#define LOONGSON_CFG2_LPM_REV2 (2 << LOONGSON_CFG2_LPMREV_OFFSET)
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#define LOONGSON_CFG2_LVZREV_OFFSET 16
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#define LOONGSON_CFG2_LVZ_REV1 (1 << LOONGSON_CFG2_LVZREV_OFFSET)
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#define LOONGSON_CFG2_LVZ_REV2 (2 << LOONGSON_CFG2_LVZREV_OFFSET)
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#define LOONGSON_CFG3 0x3
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#define LOONGSON_CFG3_LCAMP BIT(0)
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#define LOONGSON_CFG3_LCAMREV GENMASK(3, 1)
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#define LOONGSON_CFG3_LCAMNUM GENMASK(11, 4)
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#define LOONGSON_CFG3_LCAMKW GENMASK(19, 12)
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#define LOONGSON_CFG3_LCAMVW GENMASK(27, 20)
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#define LOONGSON_CFG3_LCAMREV_OFFSET 1
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#define LOONGSON_CFG3_LCAM_REV1 (1 << LOONGSON_CFG3_LCAMREV_OFFSET)
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#define LOONGSON_CFG3_LCAM_REV2 (2 << LOONGSON_CFG3_LCAMREV_OFFSET)
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#define LOONGSON_CFG3_LCAMNUM_OFFSET 4
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#define LOONGSON_CFG3_LCAMNUM_REV1 (0x3f << LOONGSON_CFG3_LCAMNUM_OFFSET)
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#define LOONGSON_CFG3_LCAMKW_OFFSET 12
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#define LOONGSON_CFG3_LCAMKW_REV1 (0x27 << LOONGSON_CFG3_LCAMKW_OFFSET)
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#define LOONGSON_CFG3_LCAMVW_OFFSET 20
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#define LOONGSON_CFG3_LCAMVW_REV1 (0x3f << LOONGSON_CFG3_LCAMVW_OFFSET)
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#define LOONGSON_CFG4 0x4
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#define LOONGSON_CFG4_CCFREQ GENMASK(31, 0)
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#define LOONGSON_CFG5 0x5
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#define LOONGSON_CFG5_CFM GENMASK(15, 0)
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#define LOONGSON_CFG5_CFD GENMASK(31, 16)
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#define LOONGSON_CFG6 0x6
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#define LOONGSON_CFG7 0x7
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#define LOONGSON_CFG7_GCCAEQRP BIT(0)
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#define LOONGSON_CFG7_UCAWINP BIT(1)
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static inline bool cpu_has_csr(void)
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{
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if (cpu_has_cfg())
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return (read_cpucfg(LOONGSON_CFG2) & LOONGSON_CFG2_LCSRP);
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return false;
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}
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static inline u32 csr_readl(u32 reg)
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{
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u32 __res;
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/* RDCSR reg, val */
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__asm__ __volatile__(
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"parse_r __res,%0\n\t"
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"parse_r reg,%1\n\t"
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".insn \n\t"
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".word (0xc8000118 | (reg << 21) | (__res << 11))\n\t"
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:"=r"(__res)
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:"r"(reg)
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:
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);
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return __res;
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}
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static inline u64 csr_readq(u32 reg)
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{
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u64 __res;
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/* DRDCSR reg, val */
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__asm__ __volatile__(
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"parse_r __res,%0\n\t"
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"parse_r reg,%1\n\t"
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".insn \n\t"
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".word (0xc8020118 | (reg << 21) | (__res << 11))\n\t"
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:"=r"(__res)
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:"r"(reg)
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:
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);
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return __res;
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}
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static inline void csr_writel(u32 val, u32 reg)
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{
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/* WRCSR reg, val */
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__asm__ __volatile__(
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"parse_r reg,%0\n\t"
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"parse_r val,%1\n\t"
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".insn \n\t"
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".word (0xc8010118 | (reg << 21) | (val << 11))\n\t"
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:
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:"r"(reg),"r"(val)
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:
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);
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}
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static inline void csr_writeq(u64 val, u32 reg)
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{
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/* DWRCSR reg, val */
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__asm__ __volatile__(
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"parse_r reg,%0\n\t"
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"parse_r val,%1\n\t"
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".insn \n\t"
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".word (0xc8030118 | (reg << 21) | (val << 11))\n\t"
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:
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:"r"(reg),"r"(val)
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:
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);
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}
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/* Public CSR Register can also be accessed with regular addresses */
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#define CSR_PUBLIC_MMIO_BASE 0x1fe00000
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#define MMIO_CSR(x) (void *)TO_UNCAC(CSR_PUBLIC_MMIO_BASE + x)
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#define LOONGSON_CSR_FEATURES 0x8
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#define LOONGSON_CSRF_TEMP BIT(0)
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#define LOONGSON_CSRF_NODECNT BIT(1)
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#define LOONGSON_CSRF_MSI BIT(2)
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#define LOONGSON_CSRF_EXTIOI BIT(3)
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#define LOONGSON_CSRF_IPI BIT(4)
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#define LOONGSON_CSRF_FREQ BIT(5)
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#define LOONGSON_CSR_VENDOR 0x10 /* Vendor name string, should be "Loongson" */
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#define LOONGSON_CSR_CPUNAME 0x20 /* Processor name string */
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#define LOONGSON_CSR_NODECNT 0x408
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#define LOONGSON_CSR_CPUTEMP 0x428
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/* PerCore CSR, only accessable by local cores */
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#define LOONGSON_CSR_IPI_STATUS 0x1000
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#define LOONGSON_CSR_IPI_EN 0x1004
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#define LOONGSON_CSR_IPI_SET 0x1008
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#define LOONGSON_CSR_IPI_CLEAR 0x100c
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#define LOONGSON_CSR_IPI_SEND 0x1040
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#define CSR_IPI_SEND_IP_SHIFT 0
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#define CSR_IPI_SEND_CPU_SHIFT 16
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#define CSR_IPI_SEND_BLOCK BIT(31)
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static inline u64 drdtime(void)
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{
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int rID = 0;
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u64 val = 0;
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__asm__ __volatile__(
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"parse_r rID,%0\n\t"
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"parse_r val,%1\n\t"
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".insn \n\t"
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".word (0xc8090118 | (rID << 21) | (val << 11))\n\t"
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:"=r"(rID),"=r"(val)
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:
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);
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return val;
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}
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#endif
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