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charset="utf-8" OCCFLG are scratch registers that can be shared with OCC firmware. Log reads and writes to the registers as a reminder when we run into more OCC code. Add RW, WO_CLEAR and WO_OR SCOM Type enums in pnv_occ.c Reviewed-by: Chalapathi V Reviewed-by: Aditya Gupta Signed-off-by: Chalapathi V Signed-off-by: Caleb Schlossin --- hw/ppc/pnv_occ.c | 55 +++++++++++++++++++++++++++++++++++++--- include/hw/ppc/pnv_occ.h | 4 +++ 2 files changed, 56 insertions(+), 3 deletions(-) diff --git a/hw/ppc/pnv_occ.c b/hw/ppc/pnv_occ.c index 64cab3e9dc..81dd5cfd1b 100644 --- a/hw/ppc/pnv_occ.c +++ b/hw/ppc/pnv_occ.c @@ -195,6 +195,49 @@ static const TypeInfo pnv_occ_power8_type_info =3D { #define P9_OCB_OCI_OCCMISC_CLEAR 0x6081 #define P9_OCB_OCI_OCCMISC_OR 0x6082 =20 +/* OCC scratch registers for flag setting */ +#define P9_OCCFLG0 0x60ac +#define P9_OCCFLG7_OR 0x60c3 + +enum ScomType { + SCOM_TYPE_RW =3D 0, + SCOM_TYPE_WO_CLEAR =3D 1, + SCOM_TYPE_WO_OR =3D 2, +}; + +static void rw_occ_flag_regs(PnvOCC *occ, uint32_t offset, bool read, + uint64_t *val) +{ + int flag_num; + int flag_type; + + /* + * Each OCCFLG register has SCOM0 - RW, SCOM1 - WO_CLEAR, SCOM2 - WO_OR + * hence divide by 3 to get flag index and mod 3 to get SCOM type. + */ + flag_num =3D (offset - P9_OCCFLG0) / 3; + flag_type =3D (offset - P9_OCCFLG0) % 3; + + if (read) { + if (flag_type) { + qemu_log_mask(LOG_GUEST_ERROR, "OCC: Write only register: Ox%" + PRIx32 "\n", offset); + return; + } + *val =3D occ->occflags[flag_num]; + } else { + switch (flag_type) { + case SCOM_TYPE_RW: + occ->occflags[flag_num] =3D *val; + break; + case SCOM_TYPE_WO_CLEAR: + occ->occflags[flag_num] &=3D ~(*val); + break; + case SCOM_TYPE_WO_OR: + occ->occflags[flag_num] |=3D *val; + } + } +} =20 static uint64_t pnv_occ_power9_xscom_read(void *opaque, hwaddr addr, unsigned size) @@ -207,8 +250,11 @@ static uint64_t pnv_occ_power9_xscom_read(void *opaque= , hwaddr addr, case P9_OCB_OCI_OCCMISC: val =3D occ->occmisc; break; + case P9_OCCFLG0 ... P9_OCCFLG7_OR: + rw_occ_flag_regs(occ, offset, 1, &val); + break; default: - qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register: Ox%" + qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register read: Ox%" HWADDR_PRIx "\n", addr >> 3); } return val; @@ -229,9 +275,12 @@ static void pnv_occ_power9_xscom_write(void *opaque, h= waddr addr, break; case P9_OCB_OCI_OCCMISC: pnv_occ_set_misc(occ, val); - break; + break; + case P9_OCCFLG0 ... P9_OCCFLG7_OR: + rw_occ_flag_regs(occ, offset, 0, &val); + break; default: - qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register: Ox%" + qemu_log_mask(LOG_UNIMP, "OCC Unimplemented register write: Ox%" HWADDR_PRIx "\n", addr >> 3); } } diff --git a/include/hw/ppc/pnv_occ.h b/include/hw/ppc/pnv_occ.h index 84bdf5004d..92a4dbf1a0 100644 --- a/include/hw/ppc/pnv_occ.h +++ b/include/hw/ppc/pnv_occ.h @@ -47,6 +47,10 @@ struct PnvOCC { /* OCC Misc interrupt */ uint64_t occmisc; =20 + /* OCC Flags */ +#define NR_FLAG_REGS 8 + uint32_t occflags[NR_FLAG_REGS]; + qemu_irq psi_irq; =20 /* OCCs operate on regions of HOMER memory */ --=20 2.47.3