diff options
Diffstat (limited to 'hw/xscom.c')
| -rw-r--r-- | hw/xscom.c | 49 |
1 files changed, 47 insertions, 2 deletions
@@ -317,7 +317,8 @@ static int __xscom_write(uint32_t gcid, uint32_t pcb_addr, uint64_t val) /* * Indirect XSCOM access functions */ -static int xscom_indirect_read(uint32_t gcid, uint64_t pcb_addr, uint64_t *val) +static int xscom_indirect_read_form0(uint32_t gcid, uint64_t pcb_addr, + uint64_t *val) { uint32_t addr; uint64_t data; @@ -360,7 +361,23 @@ static int xscom_indirect_read(uint32_t gcid, uint64_t pcb_addr, uint64_t *val) return rc; } -static int xscom_indirect_write(uint32_t gcid, uint64_t pcb_addr, uint64_t val) +static int xscom_indirect_form(uint64_t pcb_addr) +{ + return (pcb_addr >> 60) & 1; +} + +static int xscom_indirect_read(uint32_t gcid, uint64_t pcb_addr, uint64_t *val) +{ + uint64_t form = xscom_indirect_form(pcb_addr); + + if ((proc_gen == proc_gen_p9) && (form == 1)) + return OPAL_UNSUPPORTED; + + return xscom_indirect_read_form0(gcid, pcb_addr, val); +} + +static int xscom_indirect_write_form0(uint32_t gcid, uint64_t pcb_addr, + uint64_t val) { uint32_t addr; uint64_t data; @@ -402,6 +419,34 @@ static int xscom_indirect_write(uint32_t gcid, uint64_t pcb_addr, uint64_t val) return rc; } +static int xscom_indirect_write_form1(uint32_t gcid, uint64_t pcb_addr, + uint64_t val) +{ + uint32_t addr; + uint64_t data; + + if (proc_gen < proc_gen_p9) + return OPAL_UNSUPPORTED; + if (val & ~(XSCOM_DATA_IND_FORM1_DATA)) + return OPAL_PARAMETER; + + /* Mangle address and data for form1 */ + addr = (pcb_addr & 0x000ffffffff); + data = (pcb_addr & 0xfff00000000) << 20; + data |= val; + return __xscom_write(gcid, addr, data); +} + +static int xscom_indirect_write(uint32_t gcid, uint64_t pcb_addr, uint64_t val) +{ + uint64_t form = xscom_indirect_form(pcb_addr); + + if ((proc_gen == proc_gen_p9) && (form == 1)) + return xscom_indirect_write_form1(gcid, pcb_addr, val); + + return xscom_indirect_write_form0(gcid, pcb_addr, val); +} + static uint32_t xscom_decode_chiplet(uint32_t partid, uint64_t *pcb_addr) { uint32_t gcid = (partid & 0x0fffffff) >> 4; |