diff options
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/cxl.txt | 15 | ||||
| -rw-r--r-- | Documentation/powerpc/firmware-assisted-dump.txt | 34 |
2 files changed, 30 insertions, 19 deletions
diff --git a/Documentation/powerpc/cxl.txt b/Documentation/powerpc/cxl.txt index d5506ba0fef7..c5e8d5098ed3 100644 --- a/Documentation/powerpc/cxl.txt +++ b/Documentation/powerpc/cxl.txt @@ -21,7 +21,7 @@ Introduction Hardware overview ================= - POWER8 FPGA + POWER8/9 FPGA +----------+ +---------+ | | | | | CPU | | AFU | @@ -34,7 +34,7 @@ Hardware overview | | CAPP |<------>| | +---+------+ PCIE +---------+ - The POWER8 chip has a Coherently Attached Processor Proxy (CAPP) + The POWER8/9 chip has a Coherently Attached Processor Proxy (CAPP) unit which is part of the PCIe Host Bridge (PHB). This is managed by Linux by calls into OPAL. Linux doesn't directly program the CAPP. @@ -59,6 +59,17 @@ Hardware overview the fault. The context to which this fault is serviced is based on who owns that acceleration function. + POWER8 <-----> PSL Version 8 is compliant to the CAIA Version 1.0. + POWER9 <-----> PSL Version 9 is compliant to the CAIA Version 2.0. + This PSL Version 9 provides new features such as: + * Interaction with the nest MMU on the P9 chip. + * Native DMA support. + * Supports sending ASB_Notify messages for host thread wakeup. + * Supports Atomic operations. + * .... + + Cards with a PSL9 won't work on a POWER8 system and cards with a + PSL8 won't work on a POWER9 system. AFU Modes ========= diff --git a/Documentation/powerpc/firmware-assisted-dump.txt b/Documentation/powerpc/firmware-assisted-dump.txt index 3007bc98af28..19b1e3d09a19 100644 --- a/Documentation/powerpc/firmware-assisted-dump.txt +++ b/Documentation/powerpc/firmware-assisted-dump.txt @@ -105,21 +105,21 @@ memory is held. If there is no waiting dump data, then only the memory required to hold CPU state, HPTE region, boot memory dump and elfcore -header, is reserved at the top of memory (see Fig. 1). This area -is *not* released: this region will be kept permanently reserved, -so that it can act as a receptacle for a copy of the boot memory -content in addition to CPU state and HPTE region, in the case a -crash does occur. +header, is usually reserved at an offset greater than boot memory +size (see Fig. 1). This area is *not* released: this region will +be kept permanently reserved, so that it can act as a receptacle +for a copy of the boot memory content in addition to CPU state +and HPTE region, in the case a crash does occur. o Memory Reservation during first kernel - Low memory Top of memory + Low memory Top of memory 0 boot memory size | - | | |<--Reserved dump area -->| - V V | Permanent Reservation V - +-----------+----------/ /----------+---+----+-----------+----+ - | | |CPU|HPTE| DUMP |ELF | - +-----------+----------/ /----------+---+----+-----------+----+ + | | |<--Reserved dump area -->| | + V V | Permanent Reservation | V + +-----------+----------/ /---+---+----+-----------+----+------+ + | | |CPU|HPTE| DUMP |ELF | | + +-----------+----------/ /---+---+----+-----------+----+------+ | ^ | | \ / @@ -135,12 +135,12 @@ crash does occur. 0 boot memory size | | |<------------- Reserved dump area ----------- -->| V V V - +-----------+----------/ /----------+---+----+-----------+----+ - | | |CPU|HPTE| DUMP |ELF | - +-----------+----------/ /----------+---+----+-----------+----+ - | | - V V - Used by second /proc/vmcore + +-----------+----------/ /---+---+----+-----------+----+------+ + | | |CPU|HPTE| DUMP |ELF | | + +-----------+----------/ /---+---+----+-----------+----+------+ + | | + V V + Used by second /proc/vmcore kernel to boot Fig. 2 |