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t132: kick off core complex after loading MTS microcode

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Once the MTS microcode is loaded the core complex can be
directed to decode the MTS and start running. The cores,
however, won't start executing until instructed to do so.

BUG=chrome-os-partner:29222
BRANCH=None
TEST=Built, booted, ran. Noted it took about 920ms for the
     core complex to decode and handshake back.

Change-Id: I0a9ed53e596eb65801461b2769d133710a92a48a
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/206075
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Aaron Durbin 2014-07-01 13:51:21 -05:00 • committed by chrome-internal-fetch
commit 6edb6e21a6
1 changed files with 47 additions and 1 deletions
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48
src/soc/nvidia/tegra132/ccplex.c
View file

@ -21,12 +21,58 @@
#include <console/console.h>
#include <arch/io.h>
#include <cbfs.h>
#include <timer.h>
#include <soc/addressmap.h>
#include "clk_rst.h"
#include "ccplex.h"
#include "mc.h"
#include "pmc.h"
#define CLK_RST_REGS (void *)(uintptr_t)(TEGRA_CLK_RST_BASE)
#define PMC_REGS (void *)(uintptr_t)(TEGRA_PMC_BASE)
#define MTS_FILE_NAME "mts"
static int ccplex_start(void)
{
struct mono_time t1, t2;
const long timeout_us = 1500000;
long wait_time;
const uint32_t handshake_mask = 1;
const uint32_t cxreset1_mask = 1 << 21;
uint32_t reg;
struct tegra_pmc_regs * const pmc = PMC_REGS;
struct clk_rst_ctlr * const clk_rst = CLK_RST_REGS;
/* Set the handshake bit to be knocked down. */
write32(handshake_mask, &pmc->scratch118);
/* Assert nCXRSET[1] */
reg = read32(&clk_rst->rst_cpu_cmplx_set);
reg |= cxreset1_mask;
write32(reg, &clk_rst->rst_cpu_cmplx_set);
timer_monotonic_get(&t1);
while (1) {
reg = read32(&pmc->scratch118);
timer_monotonic_get(&t2);
wait_time = mono_time_diff_microseconds(&t1, &t2);
/* Wait for the bit to be knocked down. */
if ((reg & handshake_mask) != handshake_mask)
break;
if (wait_time >= timeout_us) {
printk(BIOS_DEBUG, "MTS handshake timeout.\n");
return -1;
}
}
printk(BIOS_DEBUG, "MTS handshake took %ld us.\n", wait_time);
return 0;
}
int ccplex_load_mts(void)
{
struct cbfs_file file;
@ -57,5 +103,5 @@ int ccplex_load_mts(void)
printk(BIOS_DEBUG, "MTS: %zu bytes loaded @ %p\n", nread, mts);
return 0;
return ccplex_start();
}