diff options
| author | Nishanth Menon <nm@ti.com> | 2014-04-16 11:01:02 -0500 |
|---|---|---|
| committer | Nishanth Menon <nm@ti.com> | 2014-05-05 14:33:46 -0500 |
| commit | d4d8819e205854cc102e366f30b8eadd60a58e97 (patch) | |
| tree | 410e8709f090a439c50012b6fec0bfefcf780553 | |
| parent | 97708c08c9955306742872ff7f2e47faec864ee7 (diff) | |
| download | linux-d4d8819e205854cc102e366f30b8eadd60a58e97.tar.bz2 | |
bus: omap_l3_noc: fix masterid detection
As per Documentation (OMAP4+), then masterid is infact encoded as
follows:
"L3_TARG_STDERRLOG_MSTADDR[7:0] STDERRLOG_MSTADDR stores the NTTP
master address. The master address is the concatenation of Prefix &
Initiator ConnID. It is defined on 8 bits. The 6 MSBs are used to
distinguish the different initiators."
So, when we matchup currently with the master ID list, we never get a
proper match other than when MPU is the master (thanks to 0).
Now, on other platforms such as AM437x, this tends to be bits[5:0].
Fix this by using the relevant 6MSBits to identify the master ID for
standard and custom errors.
Reported-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
| -rw-r--r-- | drivers/bus/omap_l3_noc.c | 6 | ||||
| -rw-r--r-- | drivers/bus/omap_l3_noc.h | 4 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c index 9524452ee12c..8a1926daacd7 100644 --- a/drivers/bus/omap_l3_noc.c +++ b/drivers/bus/omap_l3_noc.c @@ -127,7 +127,11 @@ static irqreturn_t l3_interrupt_handler(int irq, void *_l3) L3_TARG_STDERRLOG_MSTADDR; std_err_main = readl_relaxed(l3_targ_stderr); - masterid = readl_relaxed(l3_targ_mstaddr); + + /* STDERRLOG_MSTADDR Stores the NTTP master address. */ + masterid = (readl_relaxed(l3_targ_mstaddr) & + l3->mst_addr_mask) >> + __ffs(l3->mst_addr_mask); switch (std_err_main & CUSTOM_ERROR) { case STANDARD_ERROR: diff --git a/drivers/bus/omap_l3_noc.h b/drivers/bus/omap_l3_noc.h index 64869fe656e5..ba8692444665 100644 --- a/drivers/bus/omap_l3_noc.h +++ b/drivers/bus/omap_l3_noc.h @@ -84,6 +84,7 @@ struct l3_flagmux_data { * @l3_masters: array pointing to master data containing name and register * offset for the master. * @num_master: number of masters + * @mst_addr_mask: Mask representing MSTADDR information of NTTP packet * @debug_irq: irq number of the debug interrupt (populated runtime) * @app_irq: irq number of the application interrupt (populated runtime) */ @@ -96,6 +97,7 @@ struct omap_l3 { struct l3_masters_data *l3_masters; int num_masters; + u32 mst_addr_mask; int debug_irq; int app_irq; @@ -200,6 +202,8 @@ static const struct omap_l3 omap_l3_data = { .num_modules = ARRAY_SIZE(omap_l3_flagmux), .l3_masters = omap_l3_masters, .num_masters = ARRAY_SIZE(omap_l3_masters), + /* The 6 MSBs of register field used to distinguish initiator */ + .mst_addr_mask = 0xFC, }; #endif /* __OMAP_L3_NOC_H */ |