diff options
| author | Anson Huang <Anson.Huang@nxp.com> | 2018-10-11 16:26:50 +0800 |
|---|---|---|
| committer | Anson Huang <Anson.Huang@nxp.com> | 2018-10-23 11:06:00 +0800 |
| commit | 282f524de7f60a722910669a62bfd49eb4ec239c (patch) | |
| tree | b671f068ec295f2d73f69ba8d8911ea7e2658316 /plat/imx/imx8qxp/imx8qxp_bl31_setup.c | |
| parent | 9aa39de9f366046a363a6754b40e9f277e73adbd (diff) | |
imx8qxp: add support for cpuidle
This patch adds support for cpuidle with CPU powerdown,
there will be 3 idle states in Linux kernel:
1: wfi;
2: cpu power down;
3: cluster power down.
As Linux kernel needs a broadcast timer for waking up
CPU when whole CLUSTER is powerdown, GPT is adopted as
broadcast timer, and to make the clock & power management
easy for Linux kernel to avoid many workaround/hake in
Linux kernel, TF-A will handle GPT's power & clock management
as well as registers save/restore when suspend/resume.
Also, psci power states are used to determine CORE/CLUSTER/SYSTEM
power state to distinguish CPU idle and SYSTEM suspend which share
same domain_suspend callback.
The SoC IPs register mmap regions are merged into 1 large
section to cover all the SoC IPs register ranges TF-A needs,
this is to save mmap regions and make it simple.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Diffstat (limited to 'plat/imx/imx8qxp/imx8qxp_bl31_setup.c')
| -rw-r--r-- | plat/imx/imx8qxp/imx8qxp_bl31_setup.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/plat/imx/imx8qxp/imx8qxp_bl31_setup.c b/plat/imx/imx8qxp/imx8qxp_bl31_setup.c index 470f6254..edc2ea46 100644 --- a/plat/imx/imx8qxp/imx8qxp_bl31_setup.c +++ b/plat/imx/imx8qxp/imx8qxp_bl31_setup.c @@ -372,6 +372,11 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, */ sc_pm_set_resource_power_mode(ipc_handle, SC_R_MU_1A, SC_PM_PW_MODE_ON); + /* Turn on GPT_0's power & clock for non-secure OS/Hypervisor */ + sc_pm_set_resource_power_mode(ipc_handle, SC_R_GPT_0, SC_PM_PW_MODE_ON); + sc_pm_clock_enable(ipc_handle, SC_R_GPT_0, SC_PM_CLK_PER, true, 0); + mmio_write_32(IMX_GPT0_LPCG_BASE, mmio_read_32(IMX_GPT0_LPCG_BASE) | (1 << 25)); + /* create new partition for non-secure OS/Hypervisor * * uses global structs defined in sec_rsrc.h @@ -407,18 +412,9 @@ void bl31_plat_arch_setup(void) MT_MEMORY | MT_RW); mmap_add_region(BL31_BASE, BL31_BASE, BL31_RO_LIMIT - BL31_RO_BASE, MT_MEMORY | MT_RO); - mmap_add_region(IMX_BOOT_UART_BASE, IMX_BOOT_UART_BASE, - 0x1000, MT_DEVICE | MT_RW); - mmap_add_region(SC_IPC_CH, SC_IPC_CH, 0x10000, - MT_DEVICE | MT_RW); - mmap_add_region(PLAT_GICD_BASE, PLAT_GICD_BASE, 0x10000, - MT_DEVICE | MT_RW); - mmap_add_region(PLAT_GICR_BASE, PLAT_GICR_BASE, 0xc0000, - MT_DEVICE | MT_RW); -// mmap_add_region(IMX_GPT0_BASE, IMX_GPT0_BASE, 0x10000, -// MT_DEVICE | MT_RW); - mmap_add_region(IMX_WUP_IRQSTR, IMX_WUP_IRQSTR, 0x10000, + mmap_add_region(IMX_REG_BASE, IMX_REG_BASE, IMX_REG_SIZE, MT_DEVICE | MT_RW); + #ifdef SPD_trusty mmap_add_region(BL32_BASE, BL32_BASE, BL32_SIZE, MT_MEMORY | MT_RW); #endif |