diff options
| author | Joel Stanley <joel@jms.id.au> | 2018-02-28 16:46:10 +1030 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.ibm.com> | 2018-06-18 22:13:43 -0500 |
| commit | b09e48ffcdbffca97f7f6ebc2135a9e82dc5d9e9 (patch) | |
| tree | 9c6472d49d3d5cbc579479caf22120b386d85179 /hw | |
| parent | c032c5991207bf143dec38d6d0527fb1a1944fac (diff) | |
| download | skiboot-b09e48ffcdbffca97f7f6ebc2135a9e82dc5d9e9.zip skiboot-b09e48ffcdbffca97f7f6ebc2135a9e82dc5d9e9.tar.gz skiboot-b09e48ffcdbffca97f7f6ebc2135a9e82dc5d9e9.tar.bz2 | |
astbmc: Enable mbox depending on scratch reg
P8 boxes can opt in for mbox pnor support if they set the scratch
register bit to indicate it is supported.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/ast-bmc/ast-io.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/hw/ast-bmc/ast-io.c b/hw/ast-bmc/ast-io.c index cd1aba2..964d415 100644 --- a/hw/ast-bmc/ast-io.c +++ b/hw/ast-bmc/ast-io.c @@ -116,6 +116,7 @@ */ #define BMC_SIO_SCR29 0x29 +#define BMC_SIO_SCR29_MBOX 0x08 #define BMC_SIO_SCR29_MEMBOOT 0x10 enum { @@ -427,6 +428,19 @@ bool ast_is_ahb_lpc_pnor(void) return !(boot_flags & BMC_SIO_SCR29_MEMBOOT); } +bool ast_scratch_reg_is_mbox(void) +{ + uint8_t boot_version; + uint8_t boot_flags; + + boot_version = bmc_sio_inb(BMC_SIO_SCR28); + if (boot_version != BOOT_FLAGS_VERSION) + return false; + + boot_flags = bmc_sio_inb(BMC_SIO_SCR29); + return boot_flags & BMC_SIO_SCR29_MBOX; +} + void ast_setup_ibt(uint16_t io_base, uint8_t irq) { uint32_t v; |