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ppc/pnv: Add initial P9/10 SBE model

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The SBE (Self Boot Engine) are on-chip microcontrollers that perform
early boot steps, as well as provide some runtime facilities (e.g.,
timer, secure register access, MPIPL). The latter facilities are
accessed mostly via a message system called SBEFIFO.

This driver provides initial emulation for the SBE runtime registers
and a very basic SBEFIFO implementation that provides the timer
command. This covers the basic SBE behaviour expected by skiboot when
booting.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-Id: <20220811093726.1442343-1-npiggin@gmail.com>
[danielhb: fixed SBE_HOST_RESPONSE_MASK long line]
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Nicholas Piggin 2022-08-11 19:37:26 +10:00 • committed by Daniel Henrique Barboza
parent 21d3a78ed9
commit 0bf4d77e59
8 changed files with 524 additions and 0 deletions
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11
hw/ppc/trace-events
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@ -95,6 +95,17 @@ vof_write(uint32_t ih, unsigned cb, const char *msg) "ih=0x%x [%u] \"%s\""
vof_avail(uint64_t start, uint64_t end, uint64_t size) "0x%"PRIx64"..0x%"PRIx64" size=0x%"PRIx64
vof_claimed(uint64_t start, uint64_t end, uint64_t size) "0x%"PRIx64"..0x%"PRIx64" size=0x%"PRIx64
# pnv_sbe.c
pnv_sbe_xscom_ctrl_read(uint64_t addr, uint64_t val) "addr 0x%" PRIx64 " val 0x%" PRIx64
pnv_sbe_xscom_ctrl_write(uint64_t addr, uint64_t val) "addr 0x%" PRIx64 " val 0x%" PRIx64
pnv_sbe_xscom_mbox_read(uint64_t addr, uint64_t val) "addr 0x%" PRIx64 " val 0x%" PRIx64
pnv_sbe_xscom_mbox_write(uint64_t addr, uint64_t val) "addr 0x%" PRIx64 " val 0x%" PRIx64
pnv_sbe_reg_set_host_doorbell(uint64_t val) "val 0x%" PRIx64
pnv_sbe_cmd_timer_start(uint64_t ns) "ns 0x%" PRIu64
pnv_sbe_cmd_timer_stop(void) ""
pnv_sbe_cmd_timer_expired(void) ""
pnv_sbe_msg_recv(uint16_t cmd, uint16_t seq, uint16_t ctrl_flags) "cmd 0x%" PRIx16 " seq %"PRIu16 " ctrl_flags 0x%" PRIx16
# ppc.c
ppc_tb_adjust(uint64_t offs1, uint64_t offs2, int64_t diff, int64_t seconds) "adjusted from 0x%"PRIx64" to 0x%"PRIx64", diff %"PRId64" (%"PRId64"s)"
ppc_tb_load(uint64_t tb) "tb 0x%016" PRIx64